Annals of the South African Museum, Volume 32The Museum - Natural history |
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Page 297
... circular muscle layer is about half as thick as the nerve layer ; in W. delagoensis , however , these layers are of ... circular muscle and attaches itself to the basal membrane independent of other fibres , one finds that in the ...
... circular muscle layer is about half as thick as the nerve layer ; in W. delagoensis , however , these layers are of ... circular muscle and attaches itself to the basal membrane independent of other fibres , one finds that in the ...
Page 358
... circular musculature ( fig . 60 ) . Both layers , the longitudinal and the circular musculature , are well developed and of about equal thickness in the anterior part of the collar that encloses the proboscis neck ; farther caudally the ...
... circular musculature ( fig . 60 ) . Both layers , the longitudinal and the circular musculature , are well developed and of about equal thickness in the anterior part of the collar that encloses the proboscis neck ; farther caudally the ...
Page 359
... circular together . Usually in Enteropneusta the internal longitudinal muscle fibres stop at the vascular fold surrounding the buccal cavity , and the internal fibres along the anterior funnel - like wall of the collar form another set ...
... circular together . Usually in Enteropneusta the internal longitudinal muscle fibres stop at the vascular fold surrounding the buccal cavity , and the internal fibres along the anterior funnel - like wall of the collar form another set ...
Contents
Saccoglossus inhacensis Kapelus | 294 |
Glossobalanus alatus n | 316 |
Kapelus occurs in countless numbers on the muddy flats west of | 399 |
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1st antennae 2nd joint 6th joint apically Balanoglossus Barnard basal membrane Bay Prof blind-pouches blind-sac body branchial pore branchial region Brnrd buccal cavity canal caudal coelomic cavity collar convex Cross-section delagoensis distal dorso-lateral elongate epidermis epistome epithelium extending external longitudinal flagellum frontal lamina genital wings glandular cells glomerulus gnathopod gonads groove hind margin hydrocephalus inner ramus Isopoda joint of peraeopod keel Keurbooms River lateral length liver region lobe longitudinal musculature lumen Maxilliped median mid-line Monod muscle fibres narrow nerve cord nuclei outer ramus palp peduncle peraeon segment pericardium perihaemal cavities pharynx pleon segment pleopods Plettenberg Bay posterior end proboscis rami ramus of uropod ridge rostral point saccules Schellenberg septum setae Side-plates skeleton slightly species specimen spines Stebb Stebbing stomochord studiosorum surface T. A. Stephenson telson telsonic apex thick tubercles uropod Vanhöffen ventral mesentery ventral pharynx Zool