314 Carcinological Fauna of India. 



Chelipeds subequal, more massive and usually shorter than the 

 legs. The leurs, including the ductyli, are compressed. 



The abdomen of the male occupies the whole width of the sternum 

 between the last pair of legs : in both sexes it consists of 7 segments. 



I restrict the genus Litochira to those species which have the edge 

 of the front tuined down and distinctly arched as is shown in Kinalian's 

 figure. These species fall into two groups, in one of which the carapace 

 is a good deal broader than long, as in Kinahan's type, while in the 

 other it is nearly sqaax'e. Perhaps tliese two groups should be separa- 

 ted, though I do not recommend this course. 



Distribution : S. Atlantic and ludo-Pacific (Cape to Australia). 



Key to the Indian species of Litochira. 



I. Length of carapace abont two-thirds the greatest 

 breadth of the carapace and eqnal to the extent of the 

 fronto-orbital border ; the antero-lateral borders dis- 

 tinctly arched : — 



1. Antero-lateral borders of the carapace with three 



truncated teeth, exclusive of the orbital angle .. L. ayigustifrons. 



2. Antero-lateral borders with two distinct, though 



blunt, teeth L. setosa. 



3. Antero-lateral borders with hardly any trace of 

 lobulation — almost entire Ii. Integra. 



II. Carapace more nearly square, the fronto-orbital border 

 almost equal to its greatest breadth, so that the antei-o- 

 lateral borders are almost in the same straight line 

 with the postero-lateral borders or a very little 

 curved : — 



1. Autero-lateral borders with two spines and one 



at the orbital angle : legs unarmed L. Bcaiuiiontii. 



2. Antero-lateral borders with two spines : no spine 

 at the orbital angle ; meropodites of the legs 



with some spines L, quadriDpinonu, 



14. Litochira integra (Miers). 



Carcinoplaj! integra, Miers, Zool. H. M. S. Alert, p. 5J3, pi. xlviii. fig. C : 

 de Man, Jonrn. Linn. Soc, Zool., XXII, 1887-88, p. 93. 



Length of the carapace about two-thirds its breadth and equal to 

 the e-xtent of the fronto-orbitiil boi'der. 



Antero-lateral borders arched, without spines, though when com- 

 pletely denuded ihey are gnmular and show faint but quite distinguish- 

 able trfices of division into two lobules besides the orbital angle. 



Chelipeds less than twice the length of the carapace and shorter 

 than the legs, unarmed except for an iodistinct blunt tooth uear the 



656 



