HYODONTJD.E. 65 



49. XOTEMIGONUS CHRYSOLEUCUS, {Mitchill) Jordan. 



lu the Annals of the Lyceum of Natural Ili story of New York for the 

 present year, I have described as new a si)ecies of the genus Notemigo- 

 mis from the Ocmulgee River, Georgia, under the name of Notcmifjonus 

 ischaims, the description being drawn from a large number of young 

 specimens. 



I have lately had the opportunity of examining a number of fine adult 

 individuals of this species from the same river. Prof. Cope has also 

 obtained specimens from the St. John's River in Florida. 



This species differs from the common Notemigonus " americamis^ of the 

 North and West chiefly in the following respects: (a) in the much greater 

 size of the anal fin, the nuiuber of rays ranging from I, 15, to I, 17; 

 {b) in the greater compression of the body, which at the same time is 

 also more elongate; (c) in the larger eye; {d) in the rather more pointed 

 head; and (e) in the coloration, the sides of the body in adult males be- 

 ing more or less rosy, and the lower tins, especially the ventrals, orange, 

 verging on blood red at their tips. 



Linuaeus's original description of his Cyprinus americanus is as follows 

 (Systema Natures, ed. x, 1758, p. 321): 



Americanus 4. C. pinna ani radiis . . . , cirris plurimis. 

 Catesh. car. 2. p. 12. t. !2. 

 Alburntts amiricanus. 

 Habitat in America. 



In the twelfth edition, 17G6, p. 530, the following is substituted : 



Americanus 23. C. pinna ani radiis xviii. B. 3. D. 9. P. IG. V. 9. A. 18. C. 27. 



Habitat in Carolina. D. Garden. 



Corpus rutill, cajruleo-argenteum. Linea lateralis adaiodum arcuata versus abdo- 

 men. Cauda bifida. 



From this latter description, it is evident that the fish which Linnseus 

 had in mind was the southern Notemigonus hchanus, rather than the 

 northern so-called americanus, which, by the way, is not certainly knowu 

 to occur in Carolina. 



Wherefore the southern species, Notemigonus ischanus Jordan, should 

 be known as Notemigonus americanus, and the species of the Northern 

 States, Great Lake Region, and Mississippi Valley as Notemigonus chry. 

 soleucus, the name of Cyprinus chrysoleucus Mitchill being the oldest 

 tenable name applied to it so far as known to the writer. 



■Leuciscushoscii Cuv. & Val. is probably identical with Notemigonus 

 Bull. N. M. No. IC— 5 



