194 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY III. 



rather small, and liciico didcront from one anotln-r. The ventral ridj^e of the body is 

 Hat. The scales have many narrow, radiating furrows upon the anterior field, and arc 

 uioro deeply marked, in a straight line, across tlie lateral fields, or limiting the lateral 

 and poaterior fields, hardly atij' upon the anterior field, the waviog of the broader 

 conceutric ridges producing only a radiated api)earanco upon that field. Tube of the 

 lateral line straight and simide, arising in advance of the centre of radiation, which is 

 seated in the centre of form of the scales." — (Agassiz, Am. Joum. Sc. Ji-Ik, 185.'), p. 189.) 



C.vuriODES Giiuther, 18G3. — " Distinguished from Sdirognalhus (i. c. Iiuhalidt(hyn and 

 Ichthyobits) by its very thin, compressed pharyngeal bones, which are armed wiih a 

 comb-like series of nearly equally minute compressed teeth." — (GtJNTiiER, Cat. Fishes 

 Biit. Mus. vii, p. 24.) 



CAi{riODE.s Cope & .lordau, 1877. — " Body oblong oval, compressed ; dorsal elongate, 

 elevated in front, of 20 or more rays; fjntauelle present; pharyngeal bones narrow, 

 with the teeth relatively thin and weak; mouth small, inferior, protractile down- 

 wards." — (JoHDAN, Proc. Ac. Nat. Sc. Phila. 1877, p. 82.) 



ANALYSIS OF SPECIKS OF CARPIODE.S. 



* Dorsal fin with the anterior rays very much elevated and attenuated, equalling or 

 more usually exceeding the length of the base of the fin. 

 + Muzzle very abruptly obtuse, almost vertically truncate in front. 



fl. Muzzle exceedingly blunt, so that the anterior edge of the mandible is in line 

 with the anterior rim of the orbit, and the maxillary reaches to the anterior 

 edge of the pupil : anterior suborbital deeper than long: head 4^^ in length : 

 eye quite large, 3J to 4 in head : body arched, the depth somewhat less than 

 half the length: first ray of dorsal nearer muz/.lc than base of caudal: 



scales G-35-4 : D. 24, A. 8, V. 9 diffoijmis, 4:{. 



aa. Muzzle notably blunt, but less so than in the preceding: anterior edge of the 

 mandible in advauce of the orbit, and the maxillary just reaching the line 

 of the lower rim of the orbit : anterior suborbital bone deeper than long 

 (longer than deep, "sc/ene"): head 4 times in length: eye smallish, 4J in 

 head : body arched, the depth about 2i in length : enterior rays of doi-sal 

 about midway between snout and base of caudal : scales 7-37-5 : D. 26, A. 



8, V. 10 ci riSANSEiMNrs, 44. 



•if Muzzle conic, iirojecting, obtusely pointed : end of the mandible reaching to oppo- 

 site nostrils: anterior suborbital as deep as long: head 31 in length: eye 

 moderate, 4 to 4 J in length of head : body arched abne, the depth 2f to 2^ 

 in length : first ray of dorsal nearer muzzle than base of caudal : scales 7- 

 37-5: D. 20 or 27 ("22", Cope) VELIFEU, 4.'.. 



••Dorsal fin with the anterior rays more or less shortened, their length one-half to 

 two-thirds that of the base of the fin : muzzle more or less conic and pro- 

 jecting. 

 b. Head long, contained about 3A tim(\s in length to base of caudal : muzzle elon- 

 gate-conic, so that the eye is nearly median, the middle of the length of the 

 head tailing in front of its posterior margin : body not iiincli arclicd ; depth 

 3 in length : anterior rays of dorsal pretty high, not much shorter than the 

 base of the fin, not thickened at base: lips well developed: eye large, A\ in 

 bead: scales 7-40-5 : D. 27, A. 7, V. lU bison, 40. 



