398 



EIGENMANN— TROGLOGLANIS PATTERSONI. 



over their entire body and especially over their barbels. All of these 

 facts predispose toward a cave, existence, and various catfishes have 

 become blind in different parts of the world. I have found normal- 

 eyed catfishes in the caves of both Indiana and Kentucky. Cope 

 secured blind catfishes, dark in color, Gron'as nigrilahrls from east- 

 ern Pennsylvania. I have recently called attention to Typhlohagrus 

 kronei Ribeiro^ from the Cavernas das Areiras, Iporanga, Sao Paulo, 

 Brazil and more recently to Phreatobius cisternarnm Goeldi,* the 

 blind catfish living on the Island of Marajo. These belong to the 

 Pimelodinae, a subfamily of catfishes not found in North America. 



/a.. 



Fig. I. Trogloglanis Pattersoiii Eigenmann. Type. 



Gronias nigrilabris, from eastern Pennsylvania, is without ques- 

 tion a derivative of the universally distributed Ameiurns of the east- 

 ern and central United States. Typhlohagrus, from southeastern 

 Brazil, is derived from Pimelodella, a genus widely distributed in 

 South America, a member of the Pimelodinae. Phreatobius is more 

 remotely related to Hcptaptcrus, another but very difl:'erent member 

 of the Pimelodinae. 



The new Texan blind fish, judging by the position of its dorsal 

 and ventral fins, as well as by its adipose fin, is derived from a fish- 

 like Schilbcodcs, a genus of catfishes with nearly a dozen species, 

 generally distributed from the St. Lawrence to Texas. Schilbcodcs 



^Memoirs Carnegie Museum, VII., p. 255, Plate XXXIV., April, 1917. 

 4 L, c, p. 372, Plate LVL, 1918. 



