MOON-EYE. 875. 
90. Hyopon TERGIsus LeSueur. 
Moom-eye; Toothed Merrimg; “Silver Bass.”’ 
Hiodon tergisus, LESUEUR, Journ. Acad. Nat. Sci. Phila., i, 1818, 364. 
Hyodon tergisus, DEKay, New York Fauna, Fishes, 265.—KiRTLAND, Bost. Journ. Nat. 
Hist. v, 1846, 333 —Cuv. et VaL., Hist. Nat. des Poiss., xix, 309.—Girarp, U. S. 
Pac. R.R. Expl., Fish., 1889, 332.—GunTuxr, Cat. Fishes Brit. Mus , vii, 375.— JORDAN, 
Man. Vert., 2d Ed., 1878, 277, and of all recent authors. 
Hioion clodalus, LESUEUR, Journ. Acad. Nat. Sci. Phila., i, 1818, 367. 
Glossodon harengoides, RAFINESQU#, Amer. Monthly Mag., 1818, 354. 
Glossodon heterurus, RAFINESQUE, Amer. Monthly Mag., 1818, 354. 
Hyodon vernalis, RAFINESQU#, Ich. Oh., 1820, 43. 
Cyprinus (Abramis? ) smithii, RICHARDSON, Fauna Bor.-Amer., ili, 1836, 110. 
Leuciscus smithtt of copyisis. 
Glossodon smithti, HECKEL, Rassegger’s Reisen, 1843, 1033, (as a new genus of Cyprinidae). 
Description. Body oblong, closely compressed ; belly in front of ventrals very slightly 
transversely carinated, the edge obtuse; belly behind ventrals with the edge somewhat 
sharp; head short and blunt, the eye very large, much longer than the snout, 
three in head ; pectoral fins shorter than head, not reaching nearly to the ventrals; dorsal 
fin nearly as long as high in front; color brilliantly silvery, the back slightly darker; 
head 44-3; depth 3; D.12; A. 23; scales 5-58-8. Length about a foot. 
Habitat, Canada, Great Lake Region and entire Mississippi Valley; abundant in 
the larger streams and lakes. 
Diagnosis.—The Moon-eye may be known among Ohio fishes by its 
compressed form and brilliant white color, in connection with the sharp 
teeth and very large eye. This species may be known from the next 
by the number of developed rays (12) in the dorsal fin. 
Habite.—This fish frequents the large rivers and lakes, very seldom 
ascending small streams. It probably retires to deep waters in the win- 
ter. Itisavigorous and “gamey” fish, usually freely taking the minnow 
or fly, and it is abundant both in Lake Hrie and the Ohio, so that it is 
often taken in large numbers in seines. From its great beauty, it is usually 
salable where not well known, but its flesh is poor, and, like most 
of its relatives, its bones are smalland numerous. Dr. Estes considers it 
‘“‘one of the smartest of fishes. They will come up, taste a fly, let go and 
be gone before the angler has time to strike, Therefore to be a Moon- 
eye fly-fisher, one must be very sharp and not read a book while cast- 
ing,” (Hstes-Hallock, Sportsman’s Gazetteer, 327). The Moon-eye feeds 
on insects, crustacea and small fishes. 
91. Hyopon aLosoipes (Rafinesque) Jordan and Gilbert. 
Amphiodon alosoides, RAFINESQUE, Journal de Physique, Paris, 1819. 
Hyodon amphiodon, RAFINESQUE, Ichthyologia Ohiensis, 1820. 
Hyodon chrysopsis, RICHARDSON, Fauna Boreali-Amer., iii, 1836, 232.—JORDAN, Bull. U. 8, 
Nat. Mus., x, 1877, 68.—JORDAN, Man. Vert., 2d Ed., 1878, 277. 
