neto or rare British Crustacea. 



647 



The segments of the body are not toothed, but are charac- 

 terized by the possession of numerous transverse groups of 

 liairs or spinules on the dorsal surface of the two hist thoracic 

 and first tliree (or four in male) abdominal segments (tig-. 1). 

 Such dorsal rows of delicate hairs are also found in C.crassus, 

 C. pilosus, and other species, but they are more conspicuous 

 in C. echinatus, which owes its name to their presence. 



Fig. 5. 



Fiff. 6. 



Canthocamptus echinatus, Mrazek. 



Fig. 5.— Fifth leg of female 

 Fig. 6. — Fifth leg of male. 



As regards the appendages, my own specimens agree with 

 those of Mrazek, with the following exceptions : — 



(1) First pair of legs : The ugieement in general form is 

 complete, but the first joint of the inner branch bears a short 

 seta which is not shown in Mrazek's figure. 



(2) Fifth leg of female: The basal joint bears six setse 

 instead of five, as is also the case in the var. luenensis. In 

 other respects the agreement is close. 



(3) Fifth foot of male: Here there is no difference in the 

 number of setae, but their relative length is not the same as 

 that shown by Mrazek. The two strong spines of the basal 



