1.".0 CONTi:ii:rriO\S TO NORTH AMERICAN ICHTHYOLOGY - IV 



spring with a faint rosy lateral band; young brownish, more or less 

 uiottlril, often with continent blackish lateral blotches or a lateral band. 

 Lateral line usually imperfect in the young. L. is inches. All streams 

 from Labrador to Montana, and southward to Florida. The commonest 

 of the suckers. 



!/ I.accprde. Ili.st. Nat. I'oix. V, 502j 1 -(>:'.: ('i!i>ri)niH It n sM itehill, 

 Tr:i:i>. Lit. A 1'lii!. Soo. N. V. 1-1 I, !."<: Cntoxtomnx I- rrx ( iiinther, vii, 1."): 

 Itn* Jordan, 1. c. ]('>: (.'HtiixIniHtix <-i>Minitnix ami hoxtunii iixi .-,- l.c Suciir, Jonrn. 

 3( i. 1'liila. 1~17. '.*:>, Hi;;, etc.) 



ff. Scales .srarrrly reduced or crowded anteriorly : dorsal rays 10 or 11. 



1 13. C'. Hiisi^liis I'.aird & Oirard. 



J'.ody rather elongate, subterete, heavy at the shoulders, tapering 

 backward, the depth about o in length. Head moderate, about 4J in 

 length. .Mouth comparatively small. Lips moderate, the upper nar- 

 row, -with about 1* rows of large tubercles. Scales subeijiial. .">S-f;;5 in 

 the lateral line, 1!) in a cross-series. A series of dusky spots along each 

 row of scales, the spots often obscure, (lila Basin. 



(Ba'ml \ Cirard, Tror. Acad. Nat. Sci. Phila. 1-:>1. '.'- : C.>i>< & Yarn\v. '/.,,]. Whccl- 



. r- i:\pi. w. Kniiii M.T. v. ;;?:;. i-:c.; .Ionian, 1. c. 105.) 



111. C. Clarki I'.aird A (urard. 



15ody moderately stout, depth -I'.] in length. Head very small and 

 short, aliout 5 in length. Eye moderate. Kins all notably small. 

 Scales small, siihcipial, 9-70-9; larger mesial ly than ]>ostei'iorly. ]>ody 

 \\ith sc;ittered nebulous spots, (d/mrd.) Ari/ona. 



Baird A Cirard, 1'n.c. Acad. Nat. Sci. I'liila. l-.'.t, vJ7.) 



"Scales niodcral<', not crow. led anteriorly. I- -.':.". inlhc la:'ral line; ln'ad jicciiliarly 

 ( I/II/H nil limn Rafinesque.*) 



1 l'. < 1 . Ili^a-^-ailS l.c Sncnr. //o// SinL<r: Slimr l.'all, r; 7'i//cr: ' 'nurl-a-lottiim : 



Iliiiiiini r liiuil ; Mi, in l.ii>/i/<-r : I !i>i/ Mnlly. 



Head flattened above, t ransv'rsely roiicave between the orbits, the 

 frontal bone thick, broad, and short, the physiognomy being therefore 

 peculiar. Ventral rays normally 9. I'pper lip very thick, strongly 

 papillose, with a broad, free mar- in. \\liich has upwards of x_]< series of 

 papilla- upon it : lower lip greatly developed, strongly papillose, con 

 siderably incised behind, but less so than in ( 'ttfoxloni UN proper. Fon- 

 tanclle shorter and smaller than in (\ nmunrrxoHi. 1'ecforal tins un- 



v 



ii-iially lar.-e. I). 10 or II ; Lat. 1. -|s_.V, : ll'-lo scales in a cross- 



" li'a! .1" ini. ACM!. Nat. Sci. 1'liila. 1-1-'. I'.'l : type /><>.'//<i*s/'//) iiiiii-n>/>h'riiin 



Iv'af. -' l.cS:ieur. {'i-.i, lic]o\v; TIT//, live : lahinin. lip, Ilic live- 



loin-. I lower lip being supposed to distinguish it tVom /.'jruylosxum.) (=HylomyzonAg.) 



