"260 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



reaching to beyond its middle. Caudal peduncle rather stouter than iu 

 //. tcryisux, and the fin not so deeply Corked. Back less arched and 

 snout blunter than in the other species, the mouth larger and more, 

 oblique. Pectorals longer and veutrals shorter than in H. /m/?.vM.v, 

 Belly earinated both before and behind ventrals. Bluish; sides silvery, 

 with golden lustre. Head 4i; depth 3i. D. 9; A. 32; scales G-56-7. 

 Ohio Eiver to the Saskatchewan; common northward. 



(Ainphiodon alosoidts Raf. Journ. Phys. Paris, 1819, 421: Htjodon chrijHopsia Richard- 

 sun. Fauna Bor.-Amcr. iii, 232, 1836: Htjodon ch rysopsls Jordan, Bull. 1 T . S. Nat. Mns. x, 

 68, 1877: Uyodon amphiodon Raf. Ichth. Oh. 1820, 42.) 



*Bolly in front of ventrals not earinated; dorsal fin with 11 or 12 developed rays, 

 t Belly behind ventrals earinated. 



433. II. tcrgiSHS Le Sueur. Moon Eye; Toothed Herring. 



Body oblong, moderately compressed. Eye large, 3 in head, the max- 

 illary barely reaching its middle. Pectoral fins not reaching ventrals, 

 the latter just short of vent. Belly behind veutrals some what cariuate. 

 Color silvery, olive-shaded above. Head 4J; depth 3. D. 12; A. 28; 

 scales 5-55-7. L. 12 inches. Great Lakes and Mississippi Valley;, 

 abundant in our larger streams. One of our handsomest fishes; not 

 valued as food. 



(Le Sueur, Journ. Acad. Nat. Sci. Phila. i, 364, 1818: Iliodon clodalus Le Suenr, 1. c. 

 :!('>?: Ci/prinus (Abramis?) smithi Rich. Fauna Bor.-Amer. iii, 110; Giinther, vii, 37".; 

 Jordan, Bull. U. S. Nat. Mus. x, 68, 1877.) 



H I'.i-lly nowhere earinated. 



134. II. selcnops Jordan & Bean. 



Body more elongate, little compressed, not elevated. Belly nowhere 

 cariuate. Eye very large, 2i in head. Pectorals not reaching nearly 

 to veutrals. Clear silvery. Head 4J; depth 4. D. 12; A. 27; Lat. 1. 

 50. Cumberland 1 liver and southward. 



(Jordan & lk-un, Bull. II. S. Nat, Mus. x, 68, 1877.) 



FAMILY XXXVI. ELOPID^E. 



(The nig-cycd Herrings.) 



Body elongate, iiot much compressed, covered with cycloid scales. 

 Head naked. Mouth broad, terminal, the lower jaw prominent. Pie 

 niaxillarie* not protractile, short, the maxillaries forming the lateral 

 margins of the upper jaw. Maxillary composed of about three pieces, 

 extending backward beyond the eye. An elongate bony plate between 

 the branches of the lower jaw (like the gular plate in Amia). Bands 



