1 12 rn.vrRinrnoXS TO XOUTII AMERICAN ICHTHYOLOGY - IV. 



shortened. (Characters of inoiiili unknown, but iiroliably similar to 

 ;-i>l, ;ii,L,finn and iHirilnnnn : it is said to be "much larger than in 

 Riodrande region. ((iinird.) 



x nlliidiin Cnl. 1'ror. Arad. Nat. Sci. 1'liila. l-.~><>. 17:2; Jordan, Mau.Vert. 

 315; Jordan, r.ull. D. B. Nat. Mus. .\ii, 1-js.) 



. It..r-a! raya m--:l\ 1< SS tlian I'-': l>ody V.TV sl.-ndi-r. 



1<7. 71. COJ'VJJUim (Cope) Jordan. Tiiui;>iii</ Mnlli-t ; 



Head very short, roundish above, rather pointed forwards, about a in 

 length. Checks subvertical, their deith les.; tlian hall' the distain-r 

 1'roai snout to pivoperele. ^lontli rather lar-'e, with thick lips, which 

 are strongly plicate, the folds somewhat broken up. Eye small. Fins 

 very small; the dorsal rays 10-12; free edge of dorsal straight, its 

 longest ray less than head. Scales rather large. 6- to 40-5. Color 

 greenish brown ; a pale blotch on each scale, these forming continuous 

 streaks along the rows of scales; back with more or less distinct 

 brownish cross-blotches ; fins brownish, not much red, the dorsal black- 

 ish at tip. Size smallest in the genus. Length less than a foot. Rivers 

 of the South Atlantic States from the James to the Chattahooch.ee. 



(Ti-rctiilnx fi-rriini* Cope, Journ. Acad. Xzit. Sri. Phila. IHu'S, -'.'>(> : J'li/dtostomns 



nut <'"]"'- I'i'"'. AIIKT. 1'liil. Soc. Phila. 1870,478; Jordan, Man. Y<Tt.:>15; Jordan, 



Bull. U. S. Nat. MILS, xii, 



69. PJLACOPIIAKYNX Cop-. 



, I'mc. AIIHT. 1'hil. Soc. Phila. 1870, 4:'7 : type. Plaoopharynx carinatus Copo.) 

 Siu-kers like M'o.rnxtoiiKi in all respects, except thai the pharvngeal 

 bone- arc much more developed and the teeth reduced in number, those 

 MI the lower hall' of the bone very large, (i-10 in number, nearly cylin- 

 drie in l;>r;;i. being but little compressed, and with a broad, r ..... i.lcd or 

 llatteiied --rinding sni-i'ace. The forms and positions of these enlarged 

 teeth vary greatly. In a specimen before us the first tooth is thehigh- 

 and I:MI co;n]ressed, its summit being rounded and then abruptly 

 truncate. The second loothis not ably shorter and thicker, much larger, 

 and rounded on top. the body of the tooth sen ing as a peduncle for the. 

 swollen grinding surface. The third tooth is st ill .shorter and similar in 

 form. The fourth tooth is similar to the first, being much higher than 

 the second and third, and Hat on top. The others seem to be irregn 

 larl\ alternated or arranged in pairs, a long one and a short one, the 

 Ion-- Iceth in all cases being the most 1 1 mica ted. as if their surfaces had 

 been IIK-M worn oil'. The mouth is larger and more oblique than u>ual 



