FISHES OF NEW YORK ' 131 



been reported, somewhat doubtfully, from Cemetery creek, at 

 Watertown N. Y. by Dr Evermann, 



It is a stout-bodied little species, growing to a length of 3 

 inches. 



Genus idus Heckel 



Pharyngeal teeth in two series, 3, 5-5, 3, four of those in the 

 principal row laterally compressed and hooked at the tips; lat- 

 eral line complete; eyes small. Scales small; dorsal and anal fins 

 short, without thickened anterior rays; mouth small, terminal, 

 oblique. 



74 Idus idus (Linnaeus) 



Golden Ide (Introduced) 



Cyprinus idus Linnaeus, Syst. Nat. ed. X, I, 324, 1758. 



Leuciscus idus Cuvier & Valenciennes, Hist. Nat. Poiss. XVII, 228, 1844; 



GuNTHER, Cat. Fish, Brit. Mus. VII, 229, 1868. 

 Idus melanotus Heckel & Kner, Siissw, Fiseiie, 147, figs. 77, 78, 1858. 

 Idus idus Jordan & Evermann, Check List Fishes N. A. 512, 1896. 



Body moderately elongated and compressed; least hight of 

 caudal peduncle two fifths of greatest depth of body, which is 

 two sevenths of total length without caudal; length of head 

 one fourth of total length without caudal; eye large, four times 

 in head and twice in interorbital distance, about as long as the 

 snout; mouth small; jaws equal in length, the maxillary reach- 

 ing to below the posterior nostril; pharyngeal teeth 5, 3-3, 5, 

 hooked, not serrated; dorsal outline almost regularly arched, 

 similar to ventral outline, top of head slightly flattened; dorsal 

 origin at, or somewhat behind, the middle of the length, directly 

 over the origin of the ventral, its hight nearly equal to length of 

 head; ventrals in advance of dorsal, and extending to the vent; 

 pectorals short, not reaching to ventrals; caudal deeply forked, 

 its lobes equal; lateral line decurved, its second half well below 

 the median line. Vertebrae 26 + 21 = 47. Beaches a length of 

 18 or 20 inches and the weight of 6 pounds. D. 11-12; A. 

 13-14; V. 10. Scales 9 or 10-56 to 59-7, four and one half 

 series between the lateral' line and ventral fin. 



A variety known as the golden ide, orfe, or gold nerfling has 

 been introduced, for ornamental purposes, into American ponds. 



