480 
COROPHIIDJE, 
form of the inner ramus of each of those caudal ap- 
pendages which are normally developed, and the greater 
length of their spines ; ” the fundamental character of 
both are, however, uniform. 
The name of Cyrtophium is preferred to the one which 
Dana more fully described, in consequence of its having 
been applied to an European species, previously to our 
having determined that the two were congeneric. 
This genus will probably be found to have a large 
geographical range, since, although but few specimens 
have hitherto been found, their habitats have been widely 
apart. 
Cyrtophium, Brasilieuse was dredged by Dana in the 
harbour of Rio Janeiro, while he took C . orientate at 
Singapore in the East Indies. C. tuherculatus has been 
dredged by Bruzelius on the coast of Norway, and the 
British species is not rare on the southern coast of 
England. 
