33. CERATICHTHYS. 179 



This species is said to have sometimes an additional tooth in a 

 second series of pharyngeals. 



7. Ceraticlithys stigmaticus. 

 Cape, Proc. Acad. Nat. Sc. Philad. 18G4, p. 278. 



D. 9. A. 8. L. lat. 40. L. transv. 7/?. 



" Dorsal outline rising gradually from end of muzzle to base of 

 dorsal fin ; muzzle projecting a little beyond premaxillary outline. 

 Head (eijual greatest depth) four times and a half in total length ; 

 eye thrice and one-third in length of head, its superior rim upon the 

 frontal plane. Fins short ; ventrals a little anterior to dorsal, not 

 reaching the vent. [Distance] from base of caudal to anterior base 

 of dorsal equal from latter to i)osterior nares. General colour reddish, 

 operculum and cheeks more silvery ; a brown band fi'om muzzle to 

 eye, and a very distinct spot at base of tail. Total length 2| inches. 

 Pharyngeal bones stout, the superior limb broad ; teeth -i . 1 — 1 . 4. 

 Earbcl on the end of the maxillary," 



Michigan. 



8. Ceratichthys micropogon. 



Cope, Proc. Acad. Nat. Sc. Philad. 18()4, p. 277; ov Jour n. Acad. Nat, 

 Sc. Philad. xiii. p. 366, pi. 12. fig. 2. 



D. 9. A. 8. L. lat. 40. L. transv. 6/ ?. 



" The appearance of the head of this fish is that of a HyimJepis 

 rather than of Ceratichthiis-; and the difficulty of discerning the 

 minute barbels increases the liabilit}' to err in detennining its atfi- 

 nities. Upper jaw scarcely overlapping the lower ; mouth slightly 

 oblique, angle opposite anterior border of orbit ; latter enters thrice 

 and one-fourth in length of head, which is measured thrice and 

 three-foiu'ths in length from muzzle to base of tail ; the greatest 

 depth is measured four times and one-fourth in the same distance. 

 Head broad, muzzle obtuse, profile rounded, descending ; caudal pe- 

 duncle long. Length from origin of tail to anterior base of dorsal 

 equal from dorsal to posterior nosti'il. Above pale yellowish brown ; 

 a broad brown shade from end of muzzle to base of tail ; below pale 

 yellowish." 



Conestoga River. — Length 3| inches. 



9. Ceratichthys hyalinus. 



Ceratichthys hyalinus, Cope, MS. 



D. 10. A. 9. L. lat. 41. L. transv. 6/5. 

 Mouth inferior, horizontal, the upper jaw protruding beyond the 

 lower. Barbels small, but very conspicuous. Eye very large, more 

 than one-third of tlie length of the head, and rather longer than the 

 snout. The height of the body is one-fifth of the total length ( with- 

 out caudal), the length of the head one-fourth. Origin of the dorsal 

 fin midway between the end of the snout and the root of the cauda], 

 and opposite to the origin of tlie ventral. Caudal fin deeply forked. 



X 2 ^ 



