118 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



*Lips distinctly plicate Continued. 



II. Dorsal moderate, with 12 to 14 developed rays. 



. Head comparatively large, about 4 in length : dorsal 



rays usually 12. 



o. Head short and very wide through the opercles, 

 flat above: body stout, the back somewhat 

 elevated, depth 4 in length : muzzle subtrun- 

 cate, slightly projecting : scales 6-40-5 : oliva- 

 ceous, silvery below ; dorsal fin dusky. 



CONGESTUM, 16. 



oo. Head rather long, 4- in length, flattish above : 

 body elongate, more nearly cylindrical, little 

 compressed: muzzle truncate: olivaceous, some- 

 times with rows of faint spots along the series 

 of scales ; dorsal and caudal fins black-edged : 

 size quite small: resembles M. cervinum, but the 



mouth entirely different PIDIENSE, 17. 



nn. Head very small, about 5 in length : muzzle conic, 

 much projecting beyond the very small mouth ; 

 body broadly fusiform, much compressed, the 

 back elevated and arched : dorsal rays 14 : color 

 silvery, with plumbeous shades above ; lower 



fins white : size small COREGONUS, 18. 



** Lips full, strongly papillose, much as iu the subgenus Hypentelium. 



p. Body comparatively stout, the dorsal region 

 somewhat elevated and rounded, the depth 

 being about 4 in length, the head about the 

 same : eye rather large, high up and well back, 

 the preorbital space being longer than ic the 

 other species : top of head flat : dorsal rays 12 

 to 14 : scales rather large, 6-42-5 : lips well 

 developed, deeply incised : color silvery; back 

 with smoky shading; lower fins white: size 

 large, reaches a length of about two feet 



PAPILLOSUM, 19. 



3. MYXOSTOMA CARPIO (Valenciennes} Jordan. 



Carp Mullet. White Lake Mullet. 





 1844 Catostomus carpio VALENCIENNES, Cuv. et Val. Hist. Nat. des Poiss. xvii, 457, pi. 



517. 



Catostomus carpio STOKER, Synopsis, 426, 1846. 

 Catostomus carpio GUNTHER, Cat. Fishes Brit. Mus. vii. 20, 1868. 

 Ptychostomus carpio COPE, Proc. Am. Philos. Soc. Phila. 476, 1870. 

 Ptychostomus carpio JORDAN, Fishes of Ind. 221, 1875. (Name only.) 



