204 Carcinological Fauna of India. 



the side-wall of the carapace just above the somewhat thickened epi- 

 meral edge, — the whole foreshadowing the thoracic sinus of Leucosia. 



Behind this notch the lateral border of the carapace is defined by 

 a finely beaded line, the first few beads being sometimes, in non-adults, 

 somewhat dentiform. 



The external maxillipeds are granular and hairy distally, and in 

 the female are hairy all along their apposed edges. 



The chelipeds vary a good deal according to age and sex, but are 

 always rather slender. In the adult male they are from 2§ to 2>\ times 

 the length of the carapace (without spine), in the adult female a little 

 over twice. The cylindrical arm has the proximal half to three-quarters 

 closely covered on all but its under surface with enlarged vesicular 

 granules. The hand though slightly broadened at base, is of an 

 elongate rather slender form : in the adult male it is about § the length 

 of the carapace (without spine), in the adult female half or a little 

 more than half. The fingers in the adult male are from f to \ , in the 

 adult female about f, the length of the hand : they are gently curved, 

 a little bent inwards, and somewhat slender, and their opposed edges 

 meet throughout and are finely denticulate, with larger denticles at 

 regular rather distant intervals. 



The legs are slender and not, or hardly, longer than the arm ; their 

 dactylus is narrowly lanceolate and fringed with longish stiffish hairs, 

 as is also the dorsal edge of the propodite. 



On the long penultimate piece of the male abdomen is a terminal 

 granule. 



Colours in spirit ; pinkish flesh-colour, the chelipeds and legs cop- 

 pery, the front and branchial regions often with a bluish tinge. 



The largest adult male in the Indian Museum collection has the 

 carapace 28 millim. long (without spine) and 23 millim. broad. 



Found on both coasts of the Peninsula, at the Andamans, and in 

 the Persian Gulf. 



In the Indian Museum there are 57 specimens, including numerous 

 adults of both sexes. 



[" Myra pentacantha, n. sp. ? 

 Most probably the young of M. f ugax. 

 Differs from Myra fugax Fabr. in the following characters : — 



(1) the carapace is almost circular, and is somewhat depressed, 

 except in the middle line where it is strongly carinated : 



(2) the front is thickly pubescent, and the whole of the free edge 

 of the buccal cavern is visible beyond it in a dorsal view : 



(3) the intestinal region is well defined and rather tumid, and is 

 209 



