40 BOOK OF THE BLACK BASS. 



12. MiCEOPTERUS PALLIDUS {Rof.) Gill & Jordan. 



Dr. Leon Vaillant (Mission Scientifique au Mexique: ined.) 

 divides this species provisionally into two, adopting the name " Mi- 

 cropterus salmoides " for the ordinary form, and that of Micropferus 

 nuecensis (Baird & Girard) for the south-western form (Texas and 

 Mexico). According to him the two are externally identical, but 

 M. nuecensis is distinguished by the presence of a small patch of 

 teeth on the tongue, the tongue being entirely smooth in the ordi- 

 nary form. 



I have examined a number of specimens in regard to this point. 



I find lingual teeth in the following specimens: 



(1.) Two specimens, one large, one small, from the Falls of the 

 Ohio. 



(2.) One small specimen fi'om a tributary of White Eiver at 

 Bloomington, Ind. 



(3.) One specimen (in the museum at Paris) from Texas. 



I find them absent in the following : 



(1.) Several specimens in Henshall's collection from Indian River, 

 [Fla.]. 



(2.) Specimen from Neuse River. 



(3.) Specimens from White River at Indianapolis. 



(4.) Specimens from Lake Erie. 



The presence of these teeth evidently does not depend on age, and 

 apparently not op sex. It may be a specific feature, but I am in- 

 clined at present to think it only a feature of individual variation. 

 I have not seen such teeth in the small-mouthed Black Bass. 



In 1878, Professor Jordan, while in Europe, gave great 

 attention to the investigation of the Black Bass from the 

 Paris standpoint. He examined, with the greatest care, 

 Lacepede's original type specimen, and the specimens of 

 Cuvier and Valenciennes, which are still preserved in the 

 Museum of Natural History at Paris, He was deter- 

 mined to get to the bottom of the matter, if possible, and 

 to this end consulted freely, and compared notes, with the 



