300 &GIVM. 



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 antennae are very 

 short, composed of two small square flattened joints, 

 with a short conical ten-jointed flagellum. The lower 

 antennae are nearly half the length of the body, com- 

 posed of two very short and three long basal joints, and 

 a long and slender flagellum, consisting of about twenty- 

 four articuli. These antennae 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 tres-poilues," of his C. hirtipes. The 



