8 A. Alcock— Gar cinological Fauna of India. [No. 1, 



6. Polybius, Leach, Malac. Pod. Brit, text of pi. ix. B : and Milne 

 Edwards, Hist. Nat. Crust. I. 438. 



7. *Portimus, Fabr. : Milne Edwards, Hist. Nat. Crust. I. 439. 

 Alliance 2. Coenophthalmoida, As Portunoida, but the inner 



infra-orbital angle is fused with the inner supra-orbital angle. For the 

 single genus. 



CoenophtJialmus^ A. Milne Edwards, Miss. Sci. Mex. Crust, p. 237. 



Sub-family III. Caphtrinji. 



The genus Lissocarcinus connects this sub-family, by means of 

 Thalamonyx, with the Lupinoe. Caphyra is anobher link with the 

 Lupinee, and Sphserocarcinus connects Lissocarcinus and Caphyra. 



The three constituent genera are as follows, and, in my opinion, 

 each genus is equivalent to an " alliance " in the other sub-families : — 



1. ^Lissocarcinus, Adams and White. The basal antenna-joint 

 has its an tero- external angle produced to touch the front and occlude 

 the orbital hiatus — much as in Charyhdis { — Goniosoma) : the last pair 

 of legs are swimming paddles. 



2. Sphserocarcinus, Zehntner, Rev. Suisse Zool., Ann. Mus. d' Hist. 

 Nat. Geneve, II. 1894, p. 163. As Lissocarcinus, but the last pair of 

 legs are as in Caphyra, and the carapace is very strongly convex. 



3. *Caphyra, Guerin, Ann. Sci. Nat. XXV. 1832, pp. 285, 286 

 (=:Camptonyx, Heller SB. Ak. Wien, XLIIE. 1861, i. p. 357). The 

 last pair of legs are subdorsal in position, are almost similar to the 

 other legs and end in a hook-like dactylus. The basal antenna- joint ia 

 as in Charyhdis ( = Goniosoma). 



Sub-family IV. Lupinj:. 



The genera of this sub-family fall into the 3 following alliances : — 



Alliance 1. Lupoida. The basal antenna- joint is short and squat 

 and decidedly broader than long ; or it has its greatest diameter trans- 

 verse, or obliquely transverse, owing to the extension of its antero- 

 external angle towards or into the orbit or up to the front. 



The chelipeds are usually very much longer than the legs, of which 

 the first 3 pairs have a tendency to be slender and the fourth pair 

 usually has the last four joints much broadened. 



The carapace is usually decidedly transverse with the antero- 

 lateral borders longer than the postero-lateral, and is very often crossed 

 by a few long definitely-placed transverse ridges, of which one that 

 arches inwards from the last tooth or spine of the antero- lateral border 

 on either side is the most constant. 



