Ai ti 3w i-O-t 



Article III. — A Bcvieir of the SmifisJi/'s of the noToif Gowra 

 Apoiiiofis, Lcpoiiiis, and Eiqwiiiofls, irith jKoilc/i/ar Reference to 

 tJie Species found in Illinois: By K. E. Richardson. 



During the progress of studies on material from the large 

 collection of Illinois sunfishes belonging to the Illinois State 

 Laboratory of Natural Historj-, a striking and. as it appeared 

 later, fundamental difference in form was observed Ijetween 

 the lower pharyngeals of specimens oiLcponiis pallid ns (Mitch- 



p.sp. 



i.a, - 



o.tn 



o.m. 



atit. 



ant. 



Fig. I, Eup07notis gibbosus, lower left pharyngeal, from above; 2, side 

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



Ant., anterior ape.x ; p. sp., posterior spur ; o. ??!., outer margin ; /. a., 

 inner angle. 



ill) and Enpuniofis (/ihbosas (Linnaeus). These bones in the 

 first species were found to be comparatively light, flattened 

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



