Carcinological Fauna of India. 257 



region, the base of the otoss being formed by three pustules ; three 

 pustules arranged in a triangle base forwards on the cardiac region, 

 behind which are three conical tubercles arranged in a transverse line ; 

 a coarse claw-like tooth at the lateral epibrancial angle. 



The rostrum consists of two moderately deflexed spines, which are 

 parallel, and in the closest contact, either throughout their extent, or to 

 near the tips, which may then be upcurved and slightly divergent : the 

 length of the rostrum varies from nearly one-half to one-fourth the 

 length of the carapace, its usual length is about -f-ths that of the 

 carapace. 



The antennas have the basal joint broadened and produced to form 

 the floor of the orbit, the antero-external angle being further produced 

 to form a coarse spine : the next two joints are broadened and fringed 

 with stiff bristles : the flagellum is short. The eyes are ensheathed in 

 orbits which are formed as already described : the supra-ocular eave has 

 a dog's-ear form, and the post-ocular tooth is also salient. The cheli- 

 peds in the adult male are as long as the carapace without the rostral 

 spines, and are a little stouter than the other legs : the merus is nodular 

 most markedly so on the upper surface; the carpus is granular; and the 

 palm — which is a good deal broadened and inflated — and the fingers, 

 are smooth and polished, the fingers being arched and meeting only at 

 tip. 



In the female and young male the chelipeds are only as long as the 

 post-orbital poi'tion of the carapace, are slenderer than the other legs 

 aud have the palm slender, the fingers however being arched. 



The ambulatory legs are stout, and have strong claw-like dactyli, 

 the posterior border of which is denticulate ; the ischium in all is 

 swollen, and is more or less nodular on the upper surface; and the carpus 

 in all is broadened : the first pair, which are considerably the longest 

 slightly exceed the length of the carapace and rostrum. 



In the Museum collection are forty well preserved specimens from 

 the Andamans. 



The closeness of the relation between Tiarinia and Micippa is well 

 seen in the very young of the above species, in which the carapace is 

 depressed and is so broad in front as to be almost oblong, and the 

 rostrum is deflexed at an angle of 45°. 



Family II. PARTHENOPID^E. 



Parthenopiens (part.) and Canceriens cryptopodes, Milne-Edwards Hist. Nat. 

 Crust., I. pp. 347 and 368. 



Parthenopinea, Dana, U. S. Expl. Exp., Crust., I. pp. 77 and 136 

 103 



