APPENDIX, 507 
AMPHIPODA. PHOXIDES. 
NATATORIA, 
(Vol. I. p. 170.* 

MONOCULODES LONGIMANUS, N.S. 
Specific character. Dorsal surface slightly carinated. First pair of 
gnathopoda long and narrow, resembling the second pair. 
Length, about one-fifth of an inch. 
Tuis species differs from those previously described in 
having the first pair of gnathopoda long and narrow, and 
in fact developed more nearly on the type of the second pair. 
The dorsal surface is slightly carinated. It was sent to us 
from Banff by Mr. Edward. We have two specimens, both 
of which have the superior antennz wanting, while in one 
the inferior antenne are short, and in the other they are long 
and slender. We consider the latter to be the male form, 
and the former the female. 
