APPENDIX. 



AMPHIPODA. 



NATATORIA. 



509 

 LYSIANASSIDES. 



(Vol. I. p. 118.***) 



Genus LEPIDEPECKEUM. 



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 antennae having the upper surface of the first two joints of 

 the peduncle considerably produced anteriorly, having no secondary 

 appendage. Inferior anfennse posterior to the superior. Mandibles 

 furnished with a biarticnlate 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. 



THE cephalon has the intra-antennal process produced 

 anteriorly as far as the infero-distal extremity of the first joint 



