P L A T E V 1 . 



ICTALURUS SIMPSONII Gill. 



Fig. I. Siile view of llsli, sliowiiig tbo slcixler body, the form ami position of the fins, especially tlie furcate candal and 



tbe large eyes. 

 Fig. 2. The head from above, showing the connection of the snpr.aoccipital with the he.ad of the second interspinal. 

 Fig. 3. The head from beneath, exhibiting tbe emargination of the branebiostegal membrane. 

 Fig. 4. The open month from a lateral view. 



Fkj. .'>. Tlie open month from a front view, to exhibit the dentition. 

 Fig. 6. The inferior part of the body. 



