I9I9.] 



S. Kemp : Notes on Crustacea Decapoda. 



317 



This species and S.proxima differ from all other members of 

 the genus by the fact that 

 the tympana on the meral 

 segments of the walking 

 legs, except for that on the 

 upper surface of the last 

 pair, are longitudinally div- 

 ided by a narrow ridge; 

 the tympana on the merus 

 of the cheliped do not 

 share this character. The 

 two species may be con- 

 trasted with 5. tnflata and 

 5. kochi, in which the tym- 

 pana of the walking legs are 

 normal, while that on the 

 inner face of the merus of 

 the cheliped is bisected. 



I give a fresh figure of the abdomen in this species for com- 

 parison with that of the closely allied S, proxinia. 



The specimens of S. investigatoris described by Alcock are from 

 Burma. Additional examples are from the western side of the 

 Bay of Bengal : — 



1"-^ PES. 



Text-fig. 5. — Scopimera investigatoris, 

 Alcock. 



a. Abdomen of male. 



b. Abdomen of female. 



At Chandipur the species was found in company with Dotilla 

 intermedia, de Man. 



Scopimera proxima, sp. nov. 

 Plate XII, fig. 3. 



This species is an extreiuely close ally of S. investigatoris, 

 but may be distinguished by its smoother carapace, less inflated 

 antero-laterally and, in particular, by the different form of the 

 abdomen. 



The carapace is of similar proportions to that of the allied 

 species and is about one and a half times as broad as long, with 

 its depth about equal to its length. 



In S. investigatoris a characteristic feature of the upper sur- 

 face is the presence of an inflated and conspicuously granular area 

 on each side near the antero-lateral angles. This area rises high 

 above the orbital margin and is sharply defined anteriorly and 

 externally by the steep and almost vertical declivity of its frontal 

 and lateral borders, its separation from the outer orbital angle 

 being conspicuous ; posteriorly and internally it merges gradually 

 into the general surface of the carapace. The granules of 



