APPROXIMATE TO THE AMPHIPODA 091 
the uropoda ‘present no greater resemblance to the Am- 
phipoda than to several of the Isopoda such as Asellus,’ 
although the position alone would suffice to distinguish 
them from those of Asellus, and if disjoined from the 
animal there is absolutely nothing about them that would 
enable any one to say that they belonged to any Crustacean 
except their own or some Amphipod genus. The spine 
at the lower end of the peduncle occurs as so often in the 
Amphipoda. The genus and its two species are beyond 
dispute remarkable, requiring to be placed in a separate 
family, and though some may prefer to class this among 
the Asellota, I have ventured to think that a separate tribe 
Phreatoicidea should be instituted to receive it. 
