56. LEUCISCTJS. 251 



a. Four iuches long. Susquehannah River. Presented by Thomas 



Moore, Esq. 



I" am unable to find in this fish the barbel described by Girard. 



Prof. Agassiz mentions an Hyhojysis donalis (Sillim. Journ. ] 854, 

 xvii. p. 358) from Iowa, without giving a characteristic diagnosis. 

 We have examined three specimens sent b}' him to the Liverpool 

 Museum ; they are a little more than an inch long, and appear to 

 be the young of L. storerianus. 



61. Leuciscus hudsonius. 



The Spawn-eater. (Smelt.) 



Cltipea Imdsonia, Clinton, Ann. Lye. Nat. Hist. Ncto Yorh, i. 1824, 



p. 49, pi. 2. fig. 2. 

 Leuciscus hudsonius, Dekmj, Nat. Hist. Neio York, Fish. p. 206, pi. 34. 



fig. 109; Store)', Synops. p. 157; Agassiz, Lake Snper. p. 272. 

 Hudsonius fluviatilis, Girard, Proc. Ac. Nat. Sc. Philad. 185G, p. 210. 



amarus, Girard, I. c. 



Hypopsis phaenna, Cope, Pi oe. Ac. Nat. Sc. Phil. 1864, p* 279. 

 hudsonius, Cope, Trans. Am. Phil. Sac. xiii. p. 386, pi. 12. fig. 3. 



D. 9. A. 9. L. lat. 38-39. L. transv. 6/6. 



Head and body oblong. The length of the head is somewhat 

 more than one-fifth of the total (without caudal), the height of the 

 body one-fourth. Head two-thirds as deep as long. Eye large, 

 one-third of the length of the head, equal to the width of the inter- 

 orbital space, and considerably longer than the snout. Snout very 

 obtuse, overlapping the small horizontal mouth. Suborbital bones 

 very narrow ; prajorbital as long as deep, larger than the postorbital. 

 The origin of the dorsal fin is opposite to that of the ventrals, and 

 nearly midway between the end of the snout and root of the caudal. 

 Caudal fin forked. The pectoral fins toi'minate at some distance 

 from the ventrals. There are three and a half longitudinal series 

 of scales between the lateral line and ventral fin. Silvery; a 

 blackish spot on the root of the caudal. 



Pharyngeal teeth 4 . 2 or — 1 or 2 . 4. 



United States. 



a. Three inches long. Lake Superior. Presented by Thomas 

 Moore, Esq. 



62. Leuciscus kentuckiensis. 



Luxilus kentuckiensis, (Rajin.) Kirtland, Bast. Journ, Nat. Hist. v. 



p. 27, pi. 8. fig. 3. 

 Leuciscus kentuckiensis, Storer, Mem. Amer. Ac. ii. p. 410. 

 Oyprinella kentuckiensis. Cope, Proc. Ac. Nat. Sc. Philad. 1864, p. 279. 

 Efypsilepis kentuckiensis, Cope, Trans. Am. Phil. Soc. xiii. p. 371, 



pi. 11. fig. 3. 



D. 9. A. 10. L. lat. 38-40. L. transv. 6-7/5. 



The height of the body is contained four times in the total length 



(without caudal), the length of the head four times and one-third. 



Snout somewhat acate, longer than the diameter of the eye, which 



is one-fourth or one-fifth of the length of the head ; upper jaw 



