A FOSSIL ISOPOD OF THE FRESHWATER GENUS PHREATOICT3S. 371 



Fig. 2. Phreatoicus wianamattensis, (No. 240 and 241 ; a, impression, 

 a 1 , its counterpart. X 4. 



with that of existing species, such as P. australis; the 

 basis is large and broad, the ischium long, merus of about 

 equal length and not broadened nor produced at the postero- 

 distal angle; the rest of the limb is not distinct, but the 

 whole reaches apparently as far back as the middle of the 

 4th pleon segment. Of the pleon, the first five segments 

 can be made out with tolerable certainty, though the 

 division between the 4th and 5th is not clear. These 

 segments agree pretty closely with those already described 

 for specimen 1. The inferior margin of the first segment 



