33. CERATICHTHT8. 179 



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

 second series of pharyngeals. 



7. Ceratichthys stigmaticus. 

 Cope, Proc. Acad. Nat. Sc. PhUad. 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 (equal greatest depth) four times and a half in total length ; 

 eye thrice and oue-third in length of nead, its superior rim upon the 

 frontal i)lane. Pins short ; ventrals a little anterior to dorsal, not 

 reaching the vent. [Distance] from base of caudal to antei-ior base 

 of dorsal equal from latter to posterior nares. General colour reddish, 

 operculum and cheeks more silvery; a brown band from muzzle to 

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

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

 Barbel on the end of the maxillary." 



Michigan. 



8. Ceratichthys micropogon. 



Cope, Proc, Acad. Nat. Sc. Philad. 1864, p. 277 ; or Journ, 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 tliis fish is that of a Hypsilejus 

 rather than of Ceratichtliys ; and the difiiculty of discerning the 

 minute barbels increases the liability to err in determining its afii- 

 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 measiired thrice and 

 three-fourths m 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 nostril. Above pale yellowish brown ; 

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

 yellowish." 



Conestoga Eiver. — Length 31 inches. 



9. Ceratichthys hyalinus. 



Ceratichthy.s hj-alinus, Cope, 3IS. 



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-thii'd of the length of the head, and rather longer than the 

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

 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 caudal, 

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



n2 



