76 
Guide to Crustacea . 
Table-case large pouch which is formed by enlargement of the terminal part 
No. 16. 0 f ti ie Sea-Urchin’s intestine. 
The family Gonoplacidae includes Crabs that in many respects 
approach the tribe Cyclometopa. The only British species is 
Gonoplax rhomboides. 
The small Crabs included in the family Hymenosomidae have 
Fig. 51. 
Macrophthalmus pectinipes, reduced. [Table-case No. 16.] 
a more or less triangular front, and in other respects show some 
resemblance to the Oxyrhyncha. Halicarcinas planatus, of which 
specimens obtained by the “ Discovery ” Expedition at the Auck- 
land Islands are exhibited, is found throughout the whole of the 
“ Sub- Antarctic ” region, occurring at such distant points as the 
Falkland Islands, the Cape, Kerguelen Island, and New 
Zealand. 
