APPENDIX. 509 
AMPHIPODA. LYSIANASSIDES. 
NATATORIA, (Vol. I. p. 118.***) 

Genus—LEPIDEPECREUM. 
Generic character. Cephalon having the orbital or intra-anten- 
nal process considerably developed and produced. Pereion well 
developed. Pleon having the last four segments very short. Eyes 
not made out; supposed to occupy the intra-antennal process ;— 
superior antennx having the upper surface of the first two joints of 
the peduncle considerably produced anteriorly, having no secondary 
appendage. Inferior antenne posterior to the superior. Mandibles 
furnished with a biarticulate appendage. First pair of gnathopoda 
moderately robust, subchelate. Second pair feeble and chelate or 
subchelate. Posterior pair of pleopoda short, biramous. Telson —? 

LEPIDEPECREUM CARINATUM, N.S. 
Specific character. Body dorsally carinated. Segments subequal. Fourth 
and fifth segments of pleon produced into a tooth. Gnathopoda minute and 
slender. 
Length, one-fifth of an inch. 
Tae cephalon has the intra-antennal process produced 
anteriorly as far as the infero-distal extremity of the first joint 
