300 EGIDA. 
produced inner angle of the basal joint of the lateral 
caudal appendages. 
This last character, as well as the diversity of habitat, 
induce us to consider our second native species as dis- 
tinct from the C. spinipes of Milne Edwards, who gives 
the Cape of Good Hope as its locality, with which it 
was considered as identical by Mr. A. White. 
The general form is elongate-ovate, somewhat com- 
pressed at the sides, giving the body a convex appear- 
ance ; it is very glossy and impunctate ; the pleon is not 
quite so broad as the seventh segment of the pereion. 
The head is large, wider than long (in which respect 
also the animal differs from C. spinipes as described by 
Milne Edwards), somewhat rounded in front, marked at 
each side with the impressed line which appears to be 
a character of the genus. The upper antenne are very 
short, composed of two small square flattened joints, 
with a short conical ten-jointed flagellum. The lower 
antenne are nearly half the length of the body, com- 
posed of two very short and three long basa! joints, and 
a long and slender flagellum, consisting of about twenty- 
four articuli. These antennz are separated from each 
other at the base (when seen from beneath) by a narrow 
elevated ridge, below which is a broad, short upper lip, 
with the sides rounded, and the middle of the free margin 
slightly emarginate; the mandibles are very robust, fur- 
nished with a triarticulate palpiform appendage (one of 
which is seen in our lower left-hand figure at d’). The 
legs are strong, with, especially, the middle joints broad, 
and subtriangular, their upper angle being produced 
into a point; on the outside they are armed with numer- 
ous strong bristles or slender spines, a character which 
appears to us not to accord with Milne Edwards’s de- 
scription, “ pates trés-poilues,” of his C. hirtipes. The 
