RET. A. M. NORMAN ON THE CRUSTACEA. 13 



subchelate, very large. Telson double. Last pair of pereiopods 

 very long. 



Cheirocratus mantis, n. sp. PL VII, figs. 14, 15. 



Mjes of moderate size, irregularly round, placed between the 

 origins of tbe two pairs of antennae. Superior antenna about 

 equal to the first four segments of the body in length; first joint 

 much stouter than, but not quite so long as, the second ; third 

 joint half the length of the second; filament of about twenty 

 articulations and of nearly the same length as the peduncle ; 

 secondary appendage two-jointed, and about equal in length to 

 the first two articulations of the filament. Inferior antenna 

 imperfect in the type specimen, very large and strongly deve- 

 loped, the end of the penultimate joint of the peduncle reaching 

 to half the length of the filament of the superior antennas ; the 

 olfactory denticle is large, and there is a, small spine at the infe- 

 rior extremity of the third joint. First gnathopods not subche- 

 late, having the propoclos 3-4 times as long as broad, and the 

 dactylus scarcely curved, broad, with numerous short spines 

 fringing the posterior margin. Second gnathopods having a large 

 basos which becomes gradually wider towards the lower extre- 

 mity, fringed anteriorly with very long simple hairs, and furnished 

 with a few very minute and short hairs on the hinder margin ; 

 carpus triangular, not produced above or below, but widening 

 towards the extremity to receive the very large propodos ; pro- 

 podos equalling in length the first three segments of the body, 

 about two and a half times as long as broad, widest at the com- 

 mencement of the palm, which is very oblique, half the length 

 of the propodos, and furnished with three large teeth ; dactylus 

 strong, much curved, inner margin simple, equal to rather more 

 than half the palm in length (reaching beyond the second tooth). 

 Last three pairs of pereipods having the basos twice as long as 

 broad, anteriorly beset with strong, spine-like hairs, and poste- 

 riorly with very minute slender hairs, each of which is set in a 

 little notch. Last pereipods very long, with the propodos greatly 

 developed and much flattened. First uropods extending consi- 

 derably beyond the second ; those of the last pair imperfect in 



