PLATE III. 



POTAMOCOTTtrs CAROLIN.E Gill and rOTAMOOOTTUS PUNGTULATUS Gill. 



Tho species of the subgenus Potamocottm ilill'or from tliuso of I'nnikJai only iu tlie presence of palatine teelli. TLo 

 generic characters in common with UraiiUIca are tho general form of the body and (ins, tho depressed oval head, 

 the presence of spines only on the preopercular, subopercular, and nasal bones, and the branchial apertures entirely 

 separated by a moderate isthmus. 



Fig. 1. rotatnocottiis Cnrolhuv Gill. 



Fio. 2. The same seen from .above. 



Fni. 3. Tho bead of same from below. 



Fig. 4. Potamocottus punctiilalus Gill. 



Fig. 5. Dorsal view of same. 



Fig. G. The inferior surface of the head. 



