S22 A, Alcock — Carcinological Fauna of India. [No. 3, 



The abdomen in both sexes consists of 7 separate segments and 

 does not nearly occupy all the sternum between the last pair of legs. 



Distribution: Indo-Pacific, from the Persian Gulf to Hongkong. 



From Bhizopa, of which we possess specimens from Hongkong, this 

 genus differs only in having the eyes obsolete and the external maxilli- 

 peds more closely opposed to each other. It may well be doubted 

 whether these differences are of generic value. 



Key to the Indian species of Typhlocarcinus. 



I. Anterolateral borders with 2 or 3 emarginations : — 



1. Buccal cavern decreasing in size from behind for- 

 wards : antero-external angle of merus of external 

 maxillipeds obsolete and rounded off ... ... ... T.nudus. 



2. Buccal cavern quite square : antero-external angle of 



merus of external maxillipeds sharp T. villosus. 



II. Anterolateral borders of carapace entire : buccal cavern 



quite square ... ... T. rubidus. 



24. Typhlocarcinus nudus, Stimpson. 

 Typhlocarcinus nudus, Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 96. 



Carapace much transverse, its length only about five-eighths its 

 greatest breadth, its surface smooth and bare, the regions hardly 

 distinguishable. The posterior part of the antero-lateral border has 

 two or three obscure notches. 



The front, which is about a fifth the greatest breadth of the 

 carapace, is grooved in the middle line — almost bilobed. Orbits broadly 

 oval, almost subcircular. 



Buccal cavern considerably decreasing in breadth from behind 

 forwards: merus of the external maxillipeds with the antero-external 

 angle obsolete and rounded off ; the exognath very narrow. 



Chelipeds and legs smooth, with only a few scant hairs on the 

 margin. Chelipeds, in the male about twice the length of the carapace, 

 a little longer than any of the legs : inner angle of wrist sharp, but 

 not produced : palms unequal, smooth and polished, the upper border 

 smooth and crest-like, the lower border with a distinct moulding. 



In the Indian Museum are 25 specimens, from Karachi and the 

 Mekran coast, Madras coast and Sandheads, and the Andamans. 



In this species a tiny speck of pigment denotes an eye. 



25. Typhlocarcinus villosus, Stimpson. 

 Typhlocarcinus villosus, Stimpson, Proc. Ac. Nat. Sci. Philad. 1858, p. 96 



Miers, P. Z. S., 1879, pp. 20, 40: Walker, Journ. Linn. Soc. Zool. XX. 1890, p. 110, 

 pi. ix. figs. 6-8 : Ortmann, Zool. Jahrb. Syst. VII. 1893-94, p. 689. 



Carapace and appendages everywhere covered with velvet. Carapace 



