I9I7-] S. Kemp : Notes on Crustacea Decapoda. 279 



Elamena gracilis, Borradaile. 



1906. Elamena gracilis. Borradaile, in Gardiner's Faun. Geog. Mahiive and 



Laccadive AvchipeL, II, p. 6S4, text-fig. 122 a, b. 

 191 1. Elamena gracilis, Rathbun, Yrans. Linn. Soc. Zool . (21, Xl\', p. 242. 



I have seen no specimens of this species and do not know 

 whether it should be referred to Elamena, s.s., or to Trigonoplax. 

 Judging from the figtire the lateral margins of the carapace are up- 

 turned ; but the chelae are described as slender and apparently do 

 not show ail}' sexual differences. There is no mention of a vertical 

 keel on the lower face of the rostrum. 



In the form of the carapace E. gracilis differs conspicuously 

 from any Indian species of the genus that I have seen. It was 

 described by Borradaile from Minikoi and Male Atoll and has 

 since been recorded bv Miss Rathbun from Coetivy. 



