APPENDIX, 513 
AMPHIPODA. 
NATATORIA. 
GA MMARIDES. 
(Vol. 1. p. 847.*) 
ce 
\ —~ ~— 
Wry QA 

Genus—CHEIROCRATUS. (Norman.) 
Trans. Nat. Hist. Soc. Northumberland and Durham, vol. i. p. 12. 
Generic character. Long and slender. Segments of the pereion 
and pleon subequal. Eyes round. Antenne subequal; peduncle 
of the superior shorter than the peduncle of the inferior; furnished 
with a secondary appendage. Mandibles having a long appendage. 
Gnathopoda unequal: first pair simple; second pair long, large, 
and robust. Posterior pair of pereiopoda longer than the preceding. 
Posterior pair of pleopoda long and unibranched. ‘Telson double. 

CHEIROCRATUS MANTIS. 
Specific character. Dorsal surface of the fourth segment of the pleon 
produced posteriorly into a short central and a long lateral tooth on each side, 
the space between being occupied by a long cilium. Fifth segment resembling 
the fourth, but having the teeth less important and the cilium absent. 
Length, nearly half an inch. 
Cheirocratus mantis. NoRMAN, op. cit. vol. i. p. 18, pl. vii. figs. 14, 15. 
Tue superior antenne about the length of the cephalon 
VOL. Il. LL 
