Article III. — A Review of the Sunfishes of the current Genera 

 Apomotis, Lepomis, and Eupomotis, with particular Reference to 



the Species found in Illinois. By R. E. Richardson. 



During the progress of studies on material from the large 

 collection of Illinois sunfishes belonging to the Illinois State 

 Laboratory of Natural History, a striking and, as it appeared 

 later, fundamental difference in form was observed between 

 the lower pharyngeals of specimens of Lepomis pallidum (Mitch- 



p.sp. 



p.sp. 



Lcl;— > 



o.rrt 



afit. 



o.m. 



Fig. i, Eupomotis gibbosus, lower left pharyngeal, from above; 2, side 

 view ; 3, same of Lepomis pallidus, from above ; 4, side view. 



Ant., anterior apex : p. sp., posterior spur; o. m., outer margin ; 1. a., 

 inner angle. 



ill) and Eupomotis cjibbosus (Linnseus). These bones in the 

 first species were found to be comparatively light, flattened 

 dorso-ventrally, and always narrow, the width in the length of 



