138 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY lY. 
Color silvery; back with smoky sliadiug; lower fins white. Size large; 
reaches a length of about 2 feet. Kortli Carolina to Georgia. 
(rttjchostomus pajyUlosiis Co\)f', Proc. Amer. Phil. Soc. Phila. 1870,470; Jordan, Man. 
Vert, 318; Jordan, Bull. U. S. Nat. Mns. xii, 134.) 
** Lifts distinctly plicate. 
t Lower lip infolded, ^-shaped when viewed from helow, with a distinct median 
crease, in which the two halves of the lip meet, forming an acute angle; 
mouth small. 
a. Dorsal large, with 15-17 developed rays. 
153 . M. veSateaiiSa (Cope) Jordan. 
Body stont, deep, compressed, the back elevated, the depth 3-4 in 
length. Head short, heavy, tiattisli and broad above, in length. 
Depth of cheeks half the length of the head. Eye rather large, midway 
in head, 4-5 in its length. Muzzle rather prominent, bluntish, over- 
hangi ng tbe very small moiith. Fins very large. Dorsal long and bigh, 
its height five-sixths the length of the head, its free border straight. 
Pectorals nearly reaching ventrals. Color silvery; smoky above; lower 
fins red. Size large. Upper Mississippi Valley to Georgia and south- 
ward. 
{Pfi/chosiotnus iiclatiis and coUapsus Cope, Proc. Amer. Phil. Soc. Phila. 1870, 471-47'2; 
Jordan, Man. Vert. 317; Jordan, Bull. U. S. Nat. Mus. xii, 132.) 
aa. Dorsal moderate, with 12-14 developed rays. 
h. Head comparatively large, about 4 in length; dorsal rays usually 12. 
15 - 1 . ITI. S>cacc® (Cope) Jordan. 
Head short and very wide through the opercles, flat above. Body 
stout, the back somewhat elevated, depth 4 in length. Muzzle sub- 
truncate, slightly projecting. Scales G-40-5. Olivaceous silvery be- 
low; dorsal fin dusky. Kansas. {Cope.) 
{Ptyoliostomus hucco Cope, Hayden’s Gcol. Surv. Wyom. 1872, 437; Myxostoma con- 
(jestum Jordan, Bull. U. S. Nat. Mus. xii, 133; probably not Catostomus conyestns B. & 
G. Proc. Acad. Nat. Sci. Pliila. 1854, 27, which Professor Cope thinks is a form of M. 
viacrolepidotmi, ho having obtained it in Texas and Arizona.) 
155. I7I. pidacEasc (Cope) Jordan. 
Head rather long, 44 in length, flattish above. Body elongate, more 
nearly cylindrical, little compressed. Muzzle truncate. Olivaceous, 
sometimes with rows of faint spots along the series of scales. Dorsal 
and caudal fins black-edged. Size quite small. Besembles M. cervi- 
nnm, but the mouth entirely different. Great Pedee Biver. {Cope.) 
{Ptychostomus i^idiensis, Proc. Am. Phil. Soc. Phila. 1870, 471; Jordan, Man. Vert. 
317; Jordan, Bull. U. S. Nat. Mus. xii, 133.) 
bb. Head very small, about 5 in length. 
