CRUSTACEA — W]| ITICLKfiOK. 173 



a broad, romidcd, cciid'al lolx' .'5 mm. wide; the IoIh' is marked 

 by a sliort rounded median rid<^e ; its sides an; s]i<flitly tliickcuied, 

 and it is bounded on each side l)y a sinus and a small obtuse 

 tooth ; from the hitter tlu; outei' frontal inar'j^in slojjes away 

 obli(|uely backwards to the somewhat rounded angle. Tlie upper 

 surface is smooth ; there is a pair of submedian tufts of sette 

 situated a sliort distance from the frontal margin, and a few other 

 more or less linear tufts which follow the regional depressions, and 

 a well marked submedian pair are present immediately posterior 

 to the cervical groove. 



Eye peduncles short, stout, sensibly constricted in the middle, 

 and dilated towards the summit, with a single longitudinal row 

 of hairs on the inner aspect of the superior surface. Cornea sub- 

 reniform when viewed from above. A small margined shield- 

 shaped plate is situated between the inner bases of the ocular 

 peduncles ; its anterior margin is concealed beneath a low, broad, 

 convex disc, which is surmounted by a short spine, about 0'07 mm. 

 in length. 



Ocular scales triangular, each with a tapering, acute, simple 

 and inwardly inclined spinule. 



First antennai twice as long as the eye stalks ; first joint stout, 

 shorter than the second ; third joint equal in length to the two 

 preceding. 



Peduncles of second antennae a little longer than the eye stalks ; 

 first exposed joint with a small spine on its inner distal extremity 

 and a much larger one on the outer ; the latter bears one or two 

 spinules ; second joint equal in length to the first, moderately 

 stout and somewhat swollen in the middle ; a small spinule 

 projects from the superior distal transverse mai'gin ; third joint 

 the longest, but not equal to the first and second combined. 



Flagellum about twice the length of the carapace, beset with a 

 few long and numerous short sette. Antennal acicle somewhat 

 curved, nearly reaching to the level of the eyes, armed on the 

 inner convex side with nine spinules and a few long setae. 

 External maxillipedes elongate and subpediform ; the ischium 

 joints have their margins carinate and denticulate ; the denticles 

 are about twelve in number, and consist of an alternating series 

 of larger and of smaller acute teeth, all being more or less tinged 

 with yellow at the tips. 



The right chelipede of the adult female has the outer aspect of 

 the ischium joint very short ; the internal border is longer than 

 the joint is wide ; it bears a single row of setae, a few seriate 

 granules, and is somewhat subcarinate. The merus joint is 

 trigonus, narrow proximally, and gradually increasing in diameter 

 to the summit ; the external and inferior surfaces are minutely 



