I9I7-] S. Kemp : Notes on Crustacea Decapoda. ' 277 



are roughened like the chelipedes and are thinly clothed with very 

 fine hairs. In all four pairs the merus and carpus end in a strong 

 tooth. The dactyli are slender and curved; 

 the inner margin is densely fringed with hair 

 and bears near the apex two stout recurved 

 teeth, as in E. {T.) unguiformis (text- fig. 27). 



The ultimate segment of the abdomen of 

 the male is triangular, a little broader than 

 long and with a pair of rather conspicuous p^^ 2T.—Elamena 

 pits near its base; proximally it is a little {T.)'xavieri, ?,t^. now. 

 wider than the contracted distal end of the Tip of dactylus of last 

 preceding portion. The distal margin of the walking leg. 



abdomen of the female is slightly sinuous, as 

 in E. (T.) unguiformis ; in E. (T.) cimex it is more convex. 



The carapace of a large female is 9'2 mm. in length ; males are 

 smaller, not exceeding 7*5 mm. 



In living specimens the carapace is dark brown or slate- 

 coloured, with pale antero-lateral margins and, as in E. truncata, a 

 pair of elongated pale blotches project inwards and forwards from 

 the bases of the last two pairs of legs. 



In general appearance this species bears much resemblance to 

 E. (T.) cimex ; but it is in reality more closely allied to E. (T.) un- 

 guiformis. This is clearly shown by the presence of the inter- 

 antennular septum and the tooth on the lower surface of the 

 rostrum (both of which are in fact better defined than in E. (T.) un- 

 guiformis) , and it is also evident in the structure of the dactylus of 

 the walking legs. 



The species is described from three males and three females 

 obtained in the Mandavi river, opposite the town of Nova Goa in 

 Portuguese India, They were dredged at a depth of about 10 feet 

 on a muddy bottom in places where the current ran swiftly. The 

 specific gravity of the water in which they were taken was very 

 low, about i"ooio (corrected). 



In the specific name allusion is made to St. Francis Xavier, 

 whose remains lie interred at Goa, not far from the place where 

 the specimens were obtained. 



The types bear the number 9750/10 Zool. Surv. Ind. 



Elamena (Trigonoplax) unguiformis, de Haan. 



183.9. Ocypode {Elamene) unguiformis, de Haan, in Siebold's Fauna '^apo- 

 nica, Crust., p. 75, pi. xxix, fig. i ; pi. H. 



1900. Elamena {Trigonoplax) unguiformis, Alcock, fourn. Asiat. Soc. Ben- 

 gal, LXIX, p. 357. 



1907. Trigonoplax unguiformis, de Man, Trans. Lin)i. Soc, Zool. (2), IX, 

 p. 396. 



1915. Trigonoplax unguiformis, Parisi, Atti Soc. Ital. Sci. nat., IJV, 

 p. 281. 



Other references are given by Alcock. 



This well-known species differs conspicuously from the two 

 preceding forms in the shape of the carapace, the antero-lateral 



