Carcinological Fauna of India. 



The abdomen iu botli sexes consists of 7 separate segnieuts aud, 

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



Bistrihntlon : ludo-Pacific, from the Persian Gulf to Hongkong. 



From Bhizopa, of Avhicb Ave possess specimens from Hongkong, this 

 o-euus 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 genei'ic yaJue. 



Key to the Indian species of Typhlocarcinus. 



I. Aiitero-lateral borders -Nvith 2 or 3 emarginations : — 



1. Baccal cavern decreasing in size from behind for- 

 wards : autero-extcrnal .ingle of merus of external 

 maxillipeds obsolete and rounded oft' ... ... ... T. nudity. 



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



merus of external maxillipeds sharp ... ... ... 2\ villosuti, 



II. Autero-lateral borders of carapace entire : buccal cavern 



quite squai-e ... T. ruhidus. 



24. Typhlocarcinus nudus, Stimpson. 

 Typldocarciiius nudus, Stimpson, Prpc. Ac. Nat. Sci. Philad. 1858, p. 96. 



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

 cn-eatest breadth, its surface smpptU and bare, the regions hardly, 

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

 tAvo or three obscure notches. 



The front, Avhich 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 

 anrfle obsolete and rounded off ; the exognath very narrow. 



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

 maj-'gin. Chelipeds, in the male about twice the length of the carapace, 

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

 not produced : pnlms 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 viUosiis, Stimpson. 

 Typhlocareinus 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. tigs. 6-8 : Ortmanu, Zool. Jalirb. Syst. VII. 1893-91, p. 689. 



Carapace and appendages cveiy where covered with velvet. Carapace 



664 ' ' 



