92 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY ^11. 



17. AMIDRUS XAI^THOCEPHALUS, {Eajinesqiie) Gill, 

 Small Yellow Catfish. 



(Figs. 42 and 43.) 



SUurus xanUioceplialns, Kaf. (1820), Quart. Journ. Sci. Lit. Arts, London, 51. 



Pimelodus xanthocejihalus, Eaf. (1H20), Ich. Ohiensis, 66. — Kirtlaxd (1838), Eept. 



Zool. Ohio, 169, 194.— Storek (1846), Synopsis, 405. 

 Amiurus xanthocephalus, Gill (1862), Proc. Bost. Soc. Nat. Hist. 44. — Jordan & 



CoPELAND (1876), Check List, 1.59.— Jordan (1877), Ann. Lye. Nat. Hist. 



N.Y. — . 

 Fimelodus catus, Kirtland Bost. .Journ. Nat. Hist. v. 330. (excl. syn.). 

 Amiurus albidus, Jordan (1876), Man. Verb. 302 (not Pimelodus albidus Lie Sueur).— 



Nelson (1876), Ball. Ills. Mus. Nat. Hist. 50. 

 Amiurus nehulosus, Jordan (1877), Proc. Acad. Nat. Sci. Phila. 45. 



JECabitat. — Ohio Valley. 



Eafin'esque's description of this species is rather indiiferent. Later 

 writers seem to have overlooked the species altogether, or to have con- 

 founded it with A. catus. It is certainly quite distinct from A. catus, 

 and apparently from all the others here mentioned. The ijeculiar pro- 

 file, wide head, as well as the short and small anal fin, are characteristic. 

 These points are fairly shown in Dr. Kirtland's otherwise bad figure of 

 his Pimelodus catus. 



18. AMIURUS NIGRILABRIS, {Cope) QUI S Jordan. 



Blind Catfish, 



(Figs. 44 and 45.) 



Gronias mgrilabris, Cope (1864), Proc. Acad, Nat, Sci, Phila. 231, — Jordan (1876), 

 Man, Vert. 304.— Jordan & Copeland (1876), Check List, 160, 

 Amiurus nigrilabris, Gill, MSS, 



Hahitat. — Cave streams tributary to the Conestoga River in Eastern 

 Pennsylvania. 



The concealed condition of the eyes in this species is not considered 

 by Prof. Gill as a character of sufficient importance to warrant its 

 generic separation. 



A. nigrilabris is apparently descended from A. pullus or some similar 

 species, its eyes being modified by its subterranean life. 



