300 CONTRIBUTIONS TO XORTII AMERICAN ICHTHYOLOGY IV. 



somus. Mouth rather large, terminal, the lower ja\v evidently shorter 

 Ilian upper, even when the mouth is open; tip of muzzle rather bluntly 

 truncate: maxillary reaching to opposite middle of pupil, about 3 in 

 head; mandible extending to posterior margin of pupil. Supraorbital 

 ami preorbkal narrow. Eye very large, 3i in head. Tongue with 

 tract's of teeth. Gill-rakers slender, about L'-J below the angle, rather 

 long, nearly as long as eye. Pseudobranchirc very large. Fins low; 

 free margin of dorsal very oblique. Color bluish above, sides and be- 

 low rich silvery, brighter than in any other of onr Corcyoni, mueh as in 

 Jlyoilmi Mid AW ul a. Lateral line almost straight. Head 4^ ; depth -r,'. 

 D. 10; A. 10; scales 7-75-7. L. 12 inches. Deep waters of Lake Mich- 

 igan, Lake Ontario, and neighboring lakes; the smallest and hand- 

 somest of our Corcjoni. It is intermediate in its relations between the 

 typical (!<trcyoni and Argyrosomus. 



(Argyroxomiix /io.yi (Gill, MSS.) Miluer, Kept. U. S. Fish Coin. 1872-73, 8G, 1^71; 

 Jordan, Man. Vert. cd. -J, 275.) 



**Lo\ver _ja\v project hit;-; premaxillaries narrow, placed more or less horizontally. 

 $ iicidy elon^aie, sill (fusiform; scales small, uniform, convex behind. (Anjyro- 

 sontuti Agassiz.*) 



493. C. EBarrlti (ithr. 



Steel-bluish above, with many dark points; belly white; dorsal and 

 caudal mostly blackish; pectorals and ventrals tipped with black; e\e 

 blackish, the iris silvery. Body rather elongate, compressed. Form 

 of mouth as in C. artcdi, the lower jaw considerably projecting; max- 

 illary broad, with rather broad supplemental bone, three times as long- 

 as wide, extending to middle of the very large eye, its length 3 in head; 

 prrorbital extremely narrow. Length of mandible somewhat more than 

 least depth of tail. Teeth none, or reduced to minute asperities on 

 the tongue, dill-rakers numerous, very long and slender. Dorsal 

 very hi;;!i, much higher than long, its last rays rapidly shortened, the 

 lirst rays twice the length of base of tin; insertion of dorsal midway 

 between snout and middle of adipose fin. Caudal large, well forked; 

 anal small: ventral inserted under middle of dorsal, very long. : length 

 of head: pectoral the same length. Scales as in C. ft<'<li. Head .">; 

 depth :.;. live :\ in head. D. 11; A. 14; V. 11; scales 7-SO-S. I'.ehr- 

 in-'s Sea to the north shore of Siberia, ascending rivers; lately obtained 

 by Dr. iSean in Alaska. 



(Siilinii olupeoides I'.-ill.-i-, 7.^r. K.I--;. Asi;it. iii, -lid; nuf ('IH-CI/IIIIIIH cliijKoiiicK I,a- 

 c6pedc ; ( .iini her, vi, I'.l.'i. ) 



>i/., Lake Superior, l.'n. ",:','. I : type <'i,ri't/uiins fl/ijiiifonnii D.'Kax, not of 

 y\'Hf\\iU,-.f'(iri'fji>nun (trtnli !,< Sin-nr. (c./n'r/juf, silver; u<.l>j.ta, body.) 



