470 Bulletin 47, United States National Museum. 



Kenosha in 90 fathoms in November during its spawning season. It is 

 a true Argyrosomus, though approaching Coregonus. (Named for Dr. Philo 

 R. Hoy, of Racine, Wisconsin, an able naturalist, who early collected 

 the fishes of Lake Michigan.) 



Argyrosomus hoyi, GILL MS., JORDAN, American Naturalist, March, 1875, 135, Lake Michigan, 



near Racine, "Wisconsin. (Type, No. 8902. Coll. Hoy.) 

 Coregonus hoi/i, JORDAN, Man. Vert., Ed. 2, 275, 1878; JORDAN & GILBERT, Synopsis, 299, 1883 ; 



SMITH, Bull. U. S. Fish Comm., xiv, 1894, pi. 1, fig. 1, 6; not Argyrosomus hoyi, MILNER, 



Eept. U. S. Fish Comm., 1872-73 (1875), 86 (which is A. prognathus), nor Coregonus hoyi, 



BEAN, Proc. U. S. Nat. Mus., 1882, 658 (which is A. osmeriformis). 



766. ARGYROSOMUS PTJSILLUS (Bean). 



Head 5 ; depth 5 ; eye 3f in head. D. 10 ; A. 12 ; V. 11 ; scales 10-91-9. 

 Body rather elongate, compressed. Form of mouth as in A. artedi, the 

 lower jaw considerably projecting ; maxillary broad, with rather broad 

 supplemental bone, three times as long as wide, extending not quite to 

 middle of the very large eye, its length 3 in head ; preorbital extremely 

 narrow. Mandible 2i in head. Teeth none, or reduced to minute asperi- 

 ties on the tongue. Gill rakers numerous, very long and slender, 49 in 

 all. Dorsal very high, much higher than long, its last rays rapidly short- 

 ened, the first rays twice the length of base of fin ; 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 A. artedi. Steel- 

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

 mostly blackish; pectorals and ventrals tipped with black ; eye blackish, 

 the iris silvery. Length a foot or less. Yukon River to Bering Sea and 

 northward, ascending rivers, (pusillus, feeble.) 

 Coregonus merckii, var., BEAN, Proc. U. S. Nat. Mus., 1881, 256; JORDAN & GILBERT, Synopsis, 300, 



1883 ; not of GUNTHER. 

 Coregonus pusillus, BEAN, Proc. U. S. Nat. Mus., 1888, 526, Kowak River, Alaska. (Type, No. 



38366. Coll. Chas. H. Townsend.) 



767. ARGYROSOMUS LUCIDUS (Kichardson). 

 (GREAT BEAR LAKE HERRING.) 



Head small, 5 to 5i ; depth 4fc to 4f ; eye 5. D. 11 or 12 developed rays; 

 A. 11 or 12. Scales 85 to 87, 11 or 12 scales in an oblique series 

 downward and forward from front of dorsal to lateral line. Eye slightly 

 less than length of snout, 1 times in interorbital width. Body slender, 

 elongate, the curve of back and belly about equal, the greatest depth 

 exceeding length of head. The snout narrow, almost vertically truncate 

 when mouth is closed, the lower jaw fitting within the upper, but the 

 mouth not inferior. Distance from snout to nape 2| to 3 in distance 

 between nape and front of dorsal. The head is much smaller in one of 

 our specimens than in the other. Mouth oblique, with rather slender 

 maxillary, which extends to vertical midway between front and middle 

 of pupil, its length from tip to articulation equaling distance from end of 

 snout to front of pupil, and contained 3| to 3 in length of head. Supple- 

 mental maxillary bone probably broader than in A. artedi, from f to | great- 

 est width of maxillary. Suborbitals very narrow, their least width less 



