1<I1> roMKII'.niMXs TO NORTH AMERICAN ICHTHYOLOGY - IV. 



91. P. Oil VariS (Rof.) Gill & Jordan. HuJ t'nt; Y,:ll<n<< Col ; />'.,,'/: donjon. 



Mottled brown ami yellowish. tin- latter color often predominant ; 

 whitish lidow. Body \ery long, slender, depressed forwards, closely 

 coinprcssed behind, tin- liead extremely Hat, the lower ja\v the longer. 

 Barbels short. Dorsal spine half the height of the fin. Caudal slightly 

 cmariiinate. Anal tin short, its base about one-sixth the length, its rays 

 li'-l.'i. numeral process short. Size very large, reaching a weight of 

 .~iO-7."i pounds. i:ivers of the .Mississippi Valley ami Southern States; 

 aliuiidani in deep, sluggish waters. A fish of unprepossessing appear- 

 ance, although much used as food. 



V/JI/-I/N alinirix K'at'. Anu-r. Month. Ma.u;. 1*H, I?."): Iliif,hidflitn uUrurix (Jill, Ichth. 

 ( ':ipt. Simpson's Kx[>l. l^Tti, 4'2(J : Pelodiohlhys olivaris Jordan, I.e. 95: Pimelodus punc- 

 tulutiini Jiinilicr, v, I'll : I'inu-lvduit litnonus Kaf. IcUth. Oh. G7 : Piiiielodtut aineua C. &, V. 

 xv, 135.) 



54. GRONIAS Cope. 

 Blind C/N. 



(Cop' . I'roc. Ai-ad. Nat. Sri. Phila. 16(i4, 231: type Gronian nigrilabrii Cape.) 



This ge.ius agrees with Amiio-ns in all respects, except that the eyes 

 are rudimentary and covered by the thick skin. The single species is 

 probably descended from some A inin nis of the type of nu-hts, modified 

 in accordance \\ ith its subterranean life, (rp^rj, a cavern.) 



I)-.*. 4i. iii^ridabris Cope. 



lllaek al>o\e : jaws and fins black; sides varied with yellowish ; belly 

 ]>ale. Eyes more or less rudimentary and concealed beneath the skin. 

 -laws eipial. ^lu/./le Hat. Dorsal spine midway bet weeu snout and mid- 

 dle of adipose I'm. Barbels short. Caudal slightly emargiiiate. Anal 

 with is rays. Branchiostegals 10. Cave streams (Conestoga Kiver), 



:TII Pennsylvania. 

 (Cop.', I'lf. Ai-a.l. Nai. S.-i. 1'liila. 18ri4, 231 : .tmiurit* nigrilttbr>n Jordan, 1. c.9:2.) 



55. AWIURUS Riilinrs^iie. 



Cat-fishes. 



ilim-^iii.-, [i-liili. ( ili. 1-Jii. ti:,: type Kit urn* cnpn-im R:if. PlnH-loihitiinitalvs 



I .. ^in-ill . i 



P,od\ moderately elongated, robust, anteriorly vertically ovate and 

 scarcely co]npi-c<x ( .,| : caudal peduncle also rolmst, but much compressed, 

 and at its mil c\cnl\ con\e\. Head large, wide, laterally expanded, 

 Above OVate, and in profile cuneiform; supraoccipital e\fende<l little 

 po-teii,,il\ and terminating in a more or less acute point, which is en- 

 tirel\ separate from the second intcrspiual buckler; the skin covering 



