1899.] A. Alcock — Garcinological Fauna of India. 167 



female they are hardly stouter than the legs ; but in the male they 

 are distinctly stouter, especially as regards the palm, which is club- 

 shaped : the palm is much longer than the fingers. 



The first three pair of legs increase in length, gradually but 

 slightly, from before backwards, the 3rd pair being between 4 and 4^ 

 times the length of the carapace: the dactyli are long and curved. 



The fourth pair of legs are a little longer than the male chelipeds : 

 their last two joints are short, and the dactylus folds down, like a knife- 

 blade, on a double row of spines along the posterior border of the 

 propodite. 



In both sexes the last abdominal tergum is shaped like a spear- 

 head, and the 2nd, 3rd, 4th and 6th terga have an acute tubercle in the 

 middle line. 



The carapace of an egg-laden female is 8 millim. long, the same 

 length as that of an apparently adult male. 



Colours in spirit yellow, the fingers and eyes dark brown. 



In the Indian Museum are two males and a female from the Anda- 

 man Sea, 53 fathoms {not the same station as that where Latreillia was 

 dredged). 



Distribution : Off the Andamans and off the Philippines. 



Latreillia, Roux. 



Latreillia, 'Ronx, Cmst. Medit. pi. xxii. and text: Milne Edwards, Hist. Nat. 

 Crust. I. p. 277: DeHaan, Faun. Japon., Crust., p. 105: Heller, Crust. Sudl. Europ. 

 p. 146 : Henderson, Challenger Anomura, p. 23 : A. Milne Edwards and Bouvier, 

 Crust. Decap. Hirondelle, Brach.. et Anom, (Monaco 1894) p. 59: Bouvier, Bull. Soc. 

 Philom, 1896, p. 64 : Ortmann in Bronn's Thier-Reich, V. ii., Arthropoda, p. 1156. 



Carapace elongate-piriform, not covering the basal joints of the 

 legs, its anterior part prolonged to form a subcylindrical " neck " at the 

 end of which are the spiniform rostrum, lying deflexed between two 

 long slender divergent " supra-ocular " spines, the eyes, the antennules, 

 and the antennas. The regions are fairly well indicated, and there is 

 no lineci nnomurica. 



Eyes much as in Somola^ large and borne free at the end of very 

 long and slender basal stalks. Antennae short, of filiform slenderness, 

 freely movable from their base. 



Epistome of great length fore and aft, corresponding with the 

 "neck" of the carapace. Buccal cavern well demarcated from the 

 epistome, the efferent branchial channels well defined. External 

 maxillipeds not completely closing the buccal orifice : they have a 

 pediform cast, the ischium and merus being rather narrow and the 

 flagellum coarse. 



