328 



CUMAD^. 



long-jointed peduncle, from the distal extremity of which two biarticulated 

 scales arise ; these scales lie one above the other. The first segment of the 

 peduncle is somewhat longer than the sixth abdominal segment ; the first seg- 

 ments of the scales are about half the length, and the last segment about one- 

 fourth the length of the peduncle ; the inner edge of the superior scales is armed 

 with a number of long, pointed, and articulated spines. The spines which arise 

 from the inner edge of the inferior scales are more numerous ; they are all 

 bent, their points being turned backwards ; the convex or anterior edges of all 

 these spines are very much serrated. 

 I have named this species after M. Edwards, the founder of the genus, and the 

 leading crustaceologist of the day. 



Cuma Audouinii. Edwards. 



C. — With the superior antennae very small ; with the first joint of the ambula- 

 tory division of the first pair of legs almost bent at right angles ; the terminal 

 joints oval, and the thumb-like process multiarticulate. Long, four lines to five. 

 Hab. Frith of Forth. 



Description. — Under casual observation this species is verj' apt to Ije mistaken 

 for that last described, but by careful examination the difference is found to be 

 very material. In its general appearance, this species resembles the Cuma 

 Edwardsii. The first thoracic segment, however, is longer and not so rounded ; 

 the rostrum is shorter and more pointed, and the eyes are larger ; the flattened 

 surface on the sides of this species is not so decided. The second thoracic 

 segment is more hid ; the third is larger, ovoid, and rounded ; the adjoined 



