GEN. PLANES, Bowdich.

1825. Planes, Bowdich, Excursions in Madeira and Porto Santo, p. 15, figs. 2a, 2b.

1837. Nautilograpsus, Milne-Edwards, Hist. Nat. Crust., vol. ii., p. 89.

1905. Planes, Stebbing, S.A. Crustacea, pt. 3, p. 42.

Credit for the name of this genus should, I believe, not be given to Leach, but should be shared between T. E. Bowdich and his widow, Mrs. S. Bowdich, if the signature of the plate on which the Planes is figured refers to the latter. Mr. Bowdich records an incident of his voyage, when two immense logs of American pine were hauled on board. These were completely water-logged, "covered with a continued mass of the lepas anatifera," and "also full of the teredo navalis." Further, "A small crab, fig. 3, a and b [on the plate 2a, 2b] which I conceive to be a new species of planes, was found in great numbers amongst the anatiferæ." A footnote adds: "It was of a delicate, but bright, rose colour: from the symmetrical form of its test (notched so regularly as to increase the projection and distinctness of its chaperon), it may be called P. clypeatus." The plate facing p. 16 is

signed "S. Bowdich del et lithog."

* PLANES MINUTUS (Linn.).

1758. Cancer minutus, Linn., Syst. Nat., ed. 10, vol. i., p. 625.

1825. Planes clypeatus, Bowdich, Excursions in Madeira, p. 15, figs. 2a, 2b.

1905. P. minutus, Stebbing, S.A. Crustacea, pt. 3, p. 43.

Nos. 165, 166, sent by Dr. Gilchrist from False Bay, and No. 15070 by Dr. Péringuey, specimens taken 38 miles N.W. of Table Bay.

The Nautilograpsus major, McLeay, Annulosa of S. Africa, p. 66, and N. smithii, McLeay, on the following page, are probably not distinct from Planes minutus, or at any rate do not seem to have been recognised by subsequent authors.

GEN. SESARMA, Say.

1817. Sesarma, Say, Journ. Ac. Sci. Philad., vol. i., p. 76. 1905. S., Stebbing, S.A. Crustacea, pt. 3, p. 44.

SESARMA QUADRATUM (J. C. Fabricius).

1798. Cancer quadratus, Fabricius, Suppl. Ent. Syst., p. 341. 1843. Sesarma affinis, Krauss, Südafrik. Crust., p. 45.

"At Natal Point; rare."

1900. S. quadratum, Alcock, Journ. Asiat. Soc. Bengal, vol. lxix., pt. 2, pp. 411, 413, with synonymy and many references.

SESARMA PICTUм (de Haan).

1835. Grapsus (Pachysoma) pictus, de Haan, Crustacea Japonica, p. 61, pl. 16, fig. 6.

1843. Sesarma picta, Krauss, Südafrik. Crust., p. 45.

"It lives in swarms in the mud of Natal Bay, and runs very swiftly."

1900. S. pictum, Alcock, J. A. S. B., vol. lxix., pp. 411, 414.

SESARMA TETRAGONUM (J. C. Fabricius).

1798. Cancer tetragonus, Fabricius, Suppl. Ent. Syst., p. 341. 1799. C. fascicularis, Herbst, Krabben und Krebse, vol. iii., pt. 1, p. 49, pl. 47, fig. 5.

1843. Sesarma tetragona, Krauss, Südafrik. Crust., p. 44.

According to Krauss, "The carapace is dark violet, with margins sealing-wax red; the chelipeds are beautifully coloured of the same hue. It is found on the shores of Natal Bay, where it burrows in such places as are not put under water at the spring tides. Breadth, 1 inch 6 lines; length, 1 inch 4 lines." Krauss includes in his synonymy only Herbst's species and the Sesarma tetragona of Milne-Edwards, 1837. The latter was distinguished from Cancer tetragonus, Fabricius, by de Man in 1887 under the name Sesarma meinerti. With this Ortmann in 1894 and Doflein in 1904 identify the species found by Krauss in Natal Bay. Alcock in 1900 describes both S. meinerti and S. tetragonum, without giving a reference to Krauss under either name, but identifying Herbst's C. fascicularis with C. tetragonus of Fabricius.

SESARMA RETICULATUM, Say.

1817. Sesarma reticulata, Say, Trans. Ac. Sci. Philad., vol. i., p. 73, pl. 4, fig. 5.

1838. S. r., McLeay, Annulosa of S. Africa, p. 65.

McLeay identifies his Cape specimen with Grapsus cinereus,

Bosc, 1802, and yet gives it Say's specific name, which is dated 1817. Miss Rathbun, Proc. Biol. Soc. Washington, vol. xi., 1897, distinguishes Say's species on p. 89 under a different sub-genus from that to which she assigns Bosc's species on p. 90. It leaves a vagueness about McLeay's species, since he refers both to Bosc and Say.

1843. S. r., Krauss, Südafrik. Crust., p. 45.

Krauss gives no independent information.

SESARMA LONGIPES, Krauss.

1843. Sesarma longipes, Krauss, Südafrik. Crust., p. 44, pl. 3, fig. 2. "Caught under stones at the mouth of the Umlaas River. It is very nimble in its movements."

1888. Helice (?) l., Miers, Challenger Brachyura, p. 268.

Miers suggests that the Umlaas River in Krauss stands for Umlazi.

1900. Sesarma l., Alcock, J. A. S. B., vol. lxix., pp. 413, 424.

*SESARMA CATENATUM, Ortmann.

1897. Sesarma catenata, Ortmann, Zool. Jahrb., vol. x., p. 334, pl. 17, fig. 9.

1905. S. catenatum, Stebbing, S.A. Crustacea, pt. 3, p. 44.

Nos. 3, 3A sent by Dr. Gilchrist from Kaerbooms River, Plettenberg Bay. A specimen was also sent me from the Durban Museum.

SESARMA EULIMENE, de Man.

1897. Sesarma eulimene, de Man, in Weber's Fauna von Süd-Afrika, Zool. Jahrb., vol. x., p. 157, pl. 15, fig. 1.

Umbilo River, Natal.

GEN. PLAGUSIA, Latreille.

1806. Plagusia, Latreille, Genera Crustaceorum et Insectorum,

vol. i., p. 33.

1900. P., Alcock, Journ. Asiat. Soc. Bengal, vol. Ixix., pp. 297, 436. 1905. P., Stebbing, S.A. Crustacea, pt. 3, p. 46.

* PLAGUSIA CHABRUS (Linn.).

1758. Cancer chabrus, Linn., Systema Naturæ, ed. 10, p. 628. 1835. P. capensis, de Haan, Crustacea Japonica, decas secunda, pp. 31, 58.

From the Cape of Good Hope, by Dr. Horstock [or Horstok].

1837. P. tomentosa, Milne-Edwards, Hist. Nat. Crust., vol. ii.,

p. 92.

"Inhabits the Cape of Good Hope and Chili."

1838. P. t., McLeay, Annulosa of S. Africa, p. 66.

1843. P. t., Krauss, Südafrik. Crust., p. 42, pl. 2, fig. 6.

'In the holes excavated by the surf on the rocky coast of Table Bay."

1847. P. chabrus, White, List Crust. Brit. Mus., p. 42.

"Male, Cape of Good Hope. Presented by Captain Carmichael. Male and female, S. Africa. Presented by Dr.

Andrew Smith."

1905. P. capensis, Stebbing, S.A. Crustacea, pt. 3, p. 47.

No. 195, specimens sent by Dr. Gilchrist from East London (shore) and from Three Anchor Bay.

1907. P. chabrus, Rathbun, Smithson. Misc. Coll., vol. xlix., p. 122, correction in footnote of Stimpson's P. tomentosa.

Stimpson says: "White refers this species, perhaps ustly, to the Cancer chabrus of Linnæus. But the identification does not appear to rest upon comparison of the original specimens, and until this is made we prefer to use a name to which we can refer with certainty. It is rather common about the rocks at half-tide in Simon's Bay, Cape of Good Hope."

Though now accepting the name P. chabrus, in deference to better authority than my own, I may refer to the arguments I have previously used in favour of P. capensis, which is of

older date than P. tomentosa.

PLAGUSIA SQUAMOSA (Herbst).

1790. Cancer squamosus, Herbst, Krabben und Krebse, vol. i., pt. 8, p. 260, pl. 20, fig. 113.

1843. Plagusia squamosa, Krauss, Südafrik. Crust., p. 42.

"On the surf-lashed rocks of the Natal coast near the mouth of the Umlaas River."

1900. P. depressa var. squamosa, Alcock, J. A. S. B., vol. lxix., p. 437.

1907. P. depressa (Fabricius), Rathbun, Smithson. Misc. Coll., vol. xlix., p. 112, footnote correction to Stimpson's "Plagusia squamosa (Herbst) Dana."

GEN. PERCNON, Gistel.

1835. Acanthopus, de Haan, preocc. Crustacea Japonica, decas secunda, p. 29.

1848. Percnon, Gistel, Naturgeschichte des Thierreichs, Stuttgart, P. viii.

1876. Leiolophus, Miers, Catal. Crust., New Zealand, p. 46.

1900. Liolophus, Alcock, Journ. Asiat. Soc. Bengal, vol. lxix., pp. 297, 439.

1900. Percnon, Rathbun, Proc. U.S. Nat. Mus., vol. xxii., p. 281. From this paper by Miss Rathbun, on "The Decapod Crustaceans of West Africa," the reference to Gistel is adopted.

PERCNON PLANISSIMUM (Herbst).

1804. Cancer planissimus, Herbst, Krabben und Krebse, vol. iii., pt. 4, p. 3, pl. 59, fig. 3.

1806. Plagusia clavimana, Latreille, Gen. Crust. et Ins., vol. i., p. 34. 1835. Ocypode (Acanthopus) c., de Haan, Crustacea Japonica, decas secunda, p. 30.

1838. Plagusia spinosa, McLeay, Annulosa of S. Africa, p. 66. 1843. Acanthopus clavimanus, Krauss, Südafrik. Crust., p. 42.

“Under stones and rocks at Natal Point and in Table Bay; tolerably common."

1896. Leiolophus planissimus, Miers, Catal. Crust. N. Zealand, p. 46. 1900. Liolophus p., Alcock, J. A. S. B., vol. lxix., p. 439, with numerous references.

1907. Percnon planissimum, Rathbun, Smithson. Misc. Coll., vol. xlix., p. 123, footnote correction to Stimpson's Acanthopus planissimus (Herbst) Dana."

FAMILY GECARCINIDÆ.

1852. Gecarcinidæ, Dana, U.S. Expl. Exp., vol. xiii., p. 374. 1900. Geocarcinide, Alcock, Journ. Asiat. Soc. Bengal, vol. lxix., pp. 283, 297, 440.

1901. Gecarcinide, Rathbun, Bull. U.S. Fish Comm. for 1900, vol. ii., p. 13.

1908. G., Stebbing, S.A. Crustacea, pt. 4, p. 14.

GEN. GECARCINUS, Leach.

1814. Gecarcinus, Leach, Edinb. Encycl., vol. vii., p. 430. 1837. G., Milne-Edwards, Hist. Nat. Crust., vol. ii., p. 25.

1888. Geocarcinus, Miers, Challenger Brachyura, vol. xvii., p. 217.