llvniTS AM) IIAI'NTS. IHO 



more cnrvod, and k'ss vertical, the operculum less Iul'Ii in pro- 

 portion to its len^jth, niul the Hub-opercnlum more so. The snout 

 was sharper and lonj^er, and the hd)ial plates shallower in pro- 

 portion to their len<:th. 



The hranchiostefjous rays were eight on one side, nine on the 

 other ; the dorsal fin-rays, thirteen ; the pectoral, seventeen ; the 

 ventral, eleven ; the anal, eleven ; and the caudal, twt-nty-two. 



I examined tlu' mouth as minutely as I I'ould without the aid 

 of a glass, and neither hy my eye nor my finger could I detect 

 the vestige of a tooth on the niaxillaries, interniaxillaries, tongue, 

 palate, or vonu-r. the latter ])arts heiniz of a pearly whiteness, 

 and as smooth as glass. 



The pharyngeal hones were also toothless, hut the hranchial 

 arclies were armed with erect rakers, precisely as descrihed in 

 the last-named species. 



The colours of this fish were the most beautiful, lustrous, and 

 brilliant, that I ever witnessed — the back, of a rich iridescent 

 blue, changing to greenish ; the sides, cheeks, and friii-eovtMs, 

 glittering like mother-of-pearl, and the ])elly sparkliu;,' like 

 molten silver ; the tins, of a bluish green ; the caudal xcry 

 deeply forked; the lateral line lu'arly straight. 



This exquisite and beautiful fish, so far as is known, is found 

 only in the Otsego Lake, the head waters of the Susquehana 

 Kiver; but it wouhl be vcr}' curious to compare it with the 

 so-called White Fish of ('hatau(juc Lake, a locale very similar to 

 the Otsego, e(|ually cut off from commtinieation with other 

 waters, and at about an equal elevation above tide-water. I 

 greatly suspect that the Coregoni of these two mountain lochs 

 would prove identical. 



