Jordan and Evermann. Fishes of North America. 413 



Generic characters included above. (roeiM/c, hyoid; orfo^f, tooth; 

 " hyoid " is the bone shaped like the letter Y, forming the base of the 

 tongue.) 



AMPHIODON (d/uufi, both ; 66ovs, tooth) : 



a. Belly in front of veutrals carinated ; dorsal with 9 developed rays. ALOSOIDES, 673. 



HIODON : 

 aa. Belly in front of veutrals not carinated ; dorsal with 11 or 12 developed rays. 



b. Belly behind ventrals cariuatod ; eye 3 in head. TERGISUS, 674. 



Ib. Belly nowhere cariuated ; eye 2% in head. SELENOPS, 675. 



Subgenus AMPHIODON, Itafiiu'sque. 



673. HIODON ALOSOIDES (Rafiuesque). 

 (LA QUESCHE ; NACCATSH.) 



Head 4i; depth 3i; eye 3i. D. 9; A. 32; scales 6-56-7. Body closely 

 compressed, becoming deep in the adult, the ventral edge everywhere cari- 

 nated. Maxillary reaching to beyond middle of eye. Caudal peduncle 

 rather stouter than in H. tergisua, and the fin not so deeply forked. Back 

 less arched and snout blunter than in the other species, the mouth larger 

 and more oblique. Pectorals longer and ventrals shorter than in H. ter- 

 gisus. Bluish; sides silvery, with golden luster. Ohio River and north 

 to the Saskatchewan; common northwestward. (Alosa, shad; cWof, like.) 



Amphiodon alosoides, (misprinted alveoides), RAFINESQUE, Journ. Phys., Paris, 421, 1819, Ohio R. 

 Hyodon amphiodon, RAFINESQUE, Ichth. Oh. ,42, 1820, Ohio River near the Falls. 

 Hyodon clirysopsis, RICHARDSON, Fauna Bor.-Amer., m, 232, 1836, Cumberland House, Sas- 

 katchewan River ; JORDAN, Bull. U.S. Nat. Mus.,x, 68, 1877. 

 Hyodon alosoides, JORDAN & GILBERT, Synopsis. 259, 1883. 



Subgenus HIODON. 



674. HIODON TERGISUS, Le Sueur. 



(MOON EYE ; TOOTHED HERRING.) 



Head 4i; depth 3; eye 3. D. 12; A. 28; scales 5-55-7. Vertebrae 30 + 

 31 = 61. Body oblong, moderately compressed. Eye large, the maxillary 

 barely reaching its middle. Pectoral fins not reaching veiitrals, the lat- 

 ter just short of vent. Belly behind ventrals somewhat carinate, but not 

 before ventrals. Color brilliantly silvery, olive-shaded above. Length 

 12 inches. Great Lakes and the Mississippi Valley ; north to Assiniboine 

 River; abundant in the larger streams. One of our handsomest fishes, 

 not valued as food, the flesh being dry and full of small bones, (tergisus, 

 scoured or polished.) 



Hiodon tergisus,* LE SUEUR, Journ. Ac. Nat. Sci. Phila., i, 1818, 364, Ohio River. 

 Glossodon hurengoides,* RAFINESQUE, Amer. Month. Mag., n, September, 1818, 354, Ohio River. 

 Glossodon hetenmu, RAFINESQUE, I. c., 1818, 354, Falls of Ohio River. 



Hiodon dodalus, LE SUEUR, Journ. Ac. Nat. Sci. Phila., i, 1818, 367, Ohio River at Pittsburg. 

 Hyodon vernaUs, RAFINESQUE, Ich. Oh., 42, 1820, Ohio River. 



Cyprinus (Abramis ?) smilhii, RICHARDSON, Fauna, Bor.-Amer., in, 110, 1836, Richelieu River. 

 Hyodon clcntdahts, CUVIER & VALENCIENNES, His. Nat. Poiss., xix, 313, 1846; after LE SUEUR. 

 Hyodon tergisus, Gi?NTHER, Cat., vn, 375, 1868; JORDAN, Bui. U. S. Nat. Mus., x, 68, 1877; JORDAN 

 & GILBERT, Synopsis, 259, 1883. 



* We do not know which of the nearly synchronous specific names tergisus and harengoides is 

 entitled to precedence. Tergisus is in common use, was accompanied by a better description and 

 is a better name. 



