HY0D0NTID2E. 65; 



49. NOTEMIGONUS CHEYSOLEUCUS, {MitcMll) Jordan. 



lu the Annals of tbe Lyceum of Natural History of New York for the 

 present year, I have described as new a species of the genus Notemigo- 

 nns from the Ocmulgee Eiver, Georgia, under the name of Notemigonus 

 ischanus, 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 Eiver in Florida. 



This species difiers from the common Hotemigonus " americanus^^ of the 

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

 size of the anal fin, the number 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. 



Linuseus's original description of his Cyprinus americanus is as follows- 

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



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

 Caiesb. car. 2. p. 12. t. 12. 

 Alburnus americanus. 

 Habitat in America. 



In the twelfth edition, 1766, p. 530, the following is substituted : 



Americanus 23. C. pinna ani radiis sviii. B. 3. D. 9. P. 16. V. 9. A. 18. C. 27. 



Habitat in Carolina. D. Garden. 



Corpus rutili, Cceruleo-argeuteum, Linea lateralis admodum arcuata versus abdo- 

 men. Cauda bifida. 



Erom this latter description, it is evident that the fish which Linnaeus 

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

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

 to occur in Carolina. 



Wherefore the southern species, Notemigonus iscJianus Jordan, should 

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

 States, Great Lake Eegion, and Mississippi Yalley as Notemigonus chry- 

 soleucus, the name of Cyjprinus chrysoleucus Mitchill being the oldest 

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



Leuciscus hoscii Cuv. & Yal. is probably identical with Notemigonus 

 Bull. N. M. No. W—5 



