Length, from front of head to end of third pleon segment, 12.5 mm.; total length to end of telson about 15 mm.

Locality. Dredged in lat. 33° 9′ 30′′ S., long. 28° 3′ 00′′ E., at 47 fathoms' depth, the bottom consisting of sand, shell, and rock.

The specific name is chosen out of respect to Monsieur Ed. Chevreux, who during many years by pen and pencil and active research has rendered distinguished service to our knowledge of the Amphipoda.

FAMILY AORIDÆ.

GEN. AORA, Kröyer.

1845. Aora, Kröyer, Naturhist. Tidsskr., Ser. 2, vol. i., p. 328. 1906. Aora Stebbing, Das Tierreich, Amphipoda, p. 587.

AORA TYPICA, Kröyer.

1845. Aora typica, Kröyer, Naturhist. Tidsskr., Ser. 2, vol. i.,

pl. 3, figs. 3 a-l.

p. 328,

1906. Aora typica, Stebbing, Das Tierreich, Amphipoda, p. 587, fig. 101.

Both sexes of this widely distributed species have been taken in South African waters. It has passed under a variety of generic and specific names in the writings of several authors, myself included. It is satisfactory to find that the Rev. Canon Norman (Ann. Nat. Hist., Oct., 1907) agrees with the decision set forth in Das Tierreich that there is really only one species at present known in the genus.

Locality. The specimens with which we are here concerned were obtained, with other rarer Amphipoda, at a station described as Table Mountain E. 41 miles; depth, 245 fathoms; bottom, green sand. As the species is familiar close inshore, and no closing apparatus was used in its capture, there is no guarantee that it was not taken at the surface rather than at any considerable depth.

FAMILY PHOTIDE.

GEN. EURYSTHEUS, Bate.

1857. Eurystheus, Bate, Ann. Nat. Hist., Ser. 2, vol. xix., p. 143.

1906. Eurystheus, Stebbing, Das Tierreich, Amphipoda, pp. 610,

EURYSTHEUS HOLMESI, n. sp.

Plate XL.A.

Fourth pleon segment dorsally tridentate, the median tooth smaller than the others, fifth segment with a dorso-lateral tooth on each side. Head with lateral lobes not strongly produced, the apex acute. First side-plate produced a little forwards, second to fourth with lower angles rounded, fifth as deep as fourth in front, its hind lobe shallow, sixth also bilobed with smooth lower margins. First to third pleon segments with postero-lateral angles produced to a small point.

Eyes red (in spirit), placed close to apex of the lateral lobes of the head. First antenna with stout first joint, shorter than second, equal in length to the third; accessory flagellum 6-jointed, rather longer than third joint of peduncle, principal flagellum imperfect. Second antenna with fourth and fifth joints subequal, each shorter than the 10-jointed flagellum.

Mouth-organs characteristic of the genus. Epistome pointed. Mandibular palp with 3rd joint widened, setose. Inner plate of first maxilla apparently with few setæ. Fourth joint of palp in the maxillipeds narrow.

First gnathopod slight in structure, 5th joint a little longer than the somewhat fusiform 6th. Finger in the specimen examined apparently dwarfed and malformed on one gnathopod, both hand and finger missing on the other by mutilation.

Second gnathopod large and powerful. The second joint not very elongate, channeled in front, fourth short, oblong, fifth cup-shaped, on the outer side very short, and not very long on the inner, sixth muscular, much longer than broad, front margin smooth, hind short, carrying slender spines at five points and ending in a tooth, which is slightly overlapped by the apex of the elongate finger. The long palm from a smooth curve near the finger-hinge develops a tooth followed after a short interval by one less large, and after a longer interval by a third more prominent, whence a long slope leads to the small palm-defining tooth. The finger on the proximal half of its inner margin has four or five minute teeth or serrations.

The first and second peræopods are of the usual form, with cement glands well developed. The third and fifth pairs are much shorter than the fourth, all three being distinguished in the second joint by the irregular denticulation of the hind margin, which is slightly sinuous in the fourth and fifth pairs, but forms a strongly produced lobe proximally in the third pair.

The pleopods are furnished with coupling hooks and cleft spines. The rami are slender, about ten-jointed.

The uropods in each pair have the rami nearly equal to one another and to the peduncle, the first pair being the longest, and the third much the shortest. The telson is broader than long, shorter than the peduncle of the third uropods, its sides very convex above, the distal margin truncate on the ventral surface, dorsally having a rounded emargination and spines on each blunt apex.

Length, from head to fourth pleon segment, 5 mm.

Locality. Dredged between Bird Island and mainland, in 10-16 fathoms.

The quadridentate palm of the second gnathopods and the peculiar hind margin in the last three peræopods are very distinctive marks of this species. The superior length of the fourth peræopods is rather unusual.

The specific name is chosen in compliment to Dr. S. J. Holmes, Ph.D., in recognition of his careful and beautifully illustrated work on The Amphipoda of Southern New England and other valuable labours in this branch of research.

EURYSTHEUS ATLANTICUS (Stebbing).

Plate XL.B.

1888. Gammaropsis atlantica, Stebbing, Challenger Amphipoda, Reports, vol. xxix., p. 1101, pl. 114.

1893. Protomedeia? atlantica, Della Valle, Fauna und Flora des Golfes von Neapel, vol. xx., p. 441.

1906. Eurystheus atlanticus, Stebbing, Das Tierreich, Amphipoda, p. 611.

The single specimen from which this species was originally described was a female. The sexes agree in most particulars, especially in the peculiar lageniform eyes adjoining the margin of the head and occupying its much-produced lateral angles. The second gnathopod, however, is a distinguishing feature, being in the male more massive, with a more strongly sculptured palm, in which the defining tooth is separated by a pronounced excavation from the irregularly crenate remainder of the margin. The finger also in the male does not overlap the palmar tooth as in the female, and, being widened at the middle, it has the inner edge not concave. The second joint in the third peræopods is broadly oval, nearly as broad as long, with the convex hind margin smooth.

The first and second uropods are strongly spined. The telson is but little longer than broad, apically acute.

Locality. Dredged between Bird Island and mainland, in 10-16 fathoms, and in lat. 33° 9' 30" S., long. 28° 3' 00" E.; 47 fathoms.

EURYSTHEUS AFER (Stebbing).

1888. Gammaropsis afra, Stebbing, Challenger Amphipoda, Reports, vol. xxix., p. 1097, pl. 113.

1893. Protomedeia? afra, Della Valle, Fauna und Flora des Golfes von Neapel, vol. xx., p. 440.

1906. Eurystheus afer, Stebbing, Das Tierreich, Amphipoda, p. 612.

Between this and the preceding species the most obvious distinctions are in the shape of the head, here much less produced, and in the eyes, here obliquely oblong instead of lageniform.

Locality. The two species (or perhaps varieties) occurred in the same dredgings. E. atlanticus appears to be more brilliantly coloured, or to be more retentive of its colouring than E. afer.

FAMILY COROPHIIDÆ.

GEN. CAMACHO, Stebbing.

1888. Camacho, Stebbing, Challenger Amphipoda, Reports, vol. xxix., p. 1178.

1906. Camacho, Stebbing, Das Tierreich, Amphipoda, p. 664.

CAMACHO BATHYPLOUS, Stebbing.

1888. Camacho bathyplous, Stebbing, Challenger Amphipoda, Reports, vol. xxix., p. 1179, pl. 127.

1904. Camacho bathyploüs, Coutière, Bull. Soc. philomatique (Extrait, p. 8).

1906. Camacho bathyplous, Stebbing, Das Tierreich, Amphipoda, p. 665.

The South African specimen, though smaller than that obtained by the Challenger, is in more perfect condition. Both are females. The eyes are small, but distinct. In the earlier specimen they had disappeared. The second antennæ have the fourth and fifth joints of the peduncle long, subequal, the flagellum 11-jointed, not so long as the last joint of the peduncle. In the first and second gnathopods the fifth joint is less elongate than in the Challenger

specimen. The first and second peræopods have the fourth joint much longer than the fifth or sixth, the sixth tapering, rather longer than the fifth, the finger needle-like. The third, fourth, and fifth peræopods all have the second joint narrow. The third pair correspond with the detached unnumbered peræopod figured in the Challenger report. The fourth and fifth pairs are much longer than the third pair, and have the fifth joint much shorter than the fourth or sixth.

The marsupial plates, especially those of the first and second peræopods are long, strongly fringed, and are evidently assisted in their function by the long narrow branchial vesicles.

Length of the specimen 11 mm.

Locality. Lat. 33° 9' 30" S., long. 28° 3' 0" E. Depth, 47 fathoms ; bottom, sand, shell and rock. The Challenger specimen, 16 mm. long, was taken off New Zealand in lat. 40° 28′ S., long. 177° 43′ E., at a reputed depth of 1,100 fathoms.

Professor Coutière discusses the relationship of Camacho bathyplous and Bonnier's Chevreuxius grandimanus to his own Grandidierella mahafalensis from Madagascar. A second species of Grandidierella is now known, but not yet published.