Carcinological Fanna of India, 209 



The carapace is traversed longitudinally, from the middle of the 

 gastric region, by a broadish granular carina, and tliere is an elongate 

 patch of grannies along the middle of either bi'anchial region and a 

 patch round and on the big posterior spine ; otherwise the carapace is 

 smooth. 



The front is broadly bilobulate, each semi-circular lobule having 

 a knife-edge, and although it projects beyond the margin of all parts 

 of the buccal cavern, yet the hairy tips of the external maxillipeds can 

 be seen beyond it in a dorsal view. 



Behind the front the side wall of either sub-hepatic region forms 

 a not very well marked hairy facet, behind which there is no well 

 marked marginal notch as there is in the other species. The lateral 

 margins of the carapace are well defined and beaded throughout. 



The chelipeds are nearly similar in both sexes, being slender and 

 short — onl} r about 1^ times the length of the carapace (without spine) : 

 the upper surfaces of the cylindrical arm are covered with enlarged 

 vesicular granules in the greater part of their extent, and the under 

 surface at base only : the hand is short, hardly a quarter the length of 

 the carapace (without spine) : the fingers are almost one-fourth longer 

 than the hand. 



The le_>-s are compressed, especially the cai^popodites and propod- 

 ites, the latter and the dactyli having hairy edges. 



The long penultimate piece of the abdomen of the male has a 

 terminal denticle. 



The largest male in the Indian Museum has the carapace 12 millim. 

 long and 8 millim. broad : in an apparently adult female the carapace is 

 15"5 millim. long and 10'5 millim. broad. 



A young ami two apparently adult males and an adult female from 

 a muddy bottom, in 12 fms., off the Madras coast, and a young male 

 from off the Arakan coast 13 fms., are in the Indian Museum. In the 

 last mentioned the wrist and hand are elegantly fluted with lines of 

 raised granules. 



Although our female is not laden with eggs, I conclude that it is 

 adult because it lias the wide deep brood-chamber with the broad con- 

 vex abdominal lid so familiarly found in the .adult females of the 

 Leucosi<ld3. Moreover the carapace is stained and worn as if it had not 

 been renewed for a long time. Myra elegans is cerfcaiuly not the young 

 of any other Indian species. 



Ledcosia, Fabr, 



leu 



Leucosia, Fabricins, Enfc. Syst. Suppl., p. 349. 

 Leucosiu, Milne Edwards, Hist. Nat. Crust. II. 121. 



21 1 



