468 Bulletin 47, United States National Museum. 



Subgenus ARGYROSOMUS. 

 763. ARGYROSOMUS OSMERIFORMIS (H. M. Smith). 



(SMELT OF THE NEW YORK LAKES.) 



Head 4; depth 5 to 6 ; eye 4. D. 9 ; A. 13; scales 9-83-10. Body 

 elongate, slender, back not elevated. Head rather large, its width equal 

 to half its length. Length of top of head 2 in distance from occiput to 

 dorsal; greatest depth considerably less than length of head. Eye 

 large, equal to snout. Gill rakers very long and slender, ae long as eye, 

 20 + 35. Dorsal fin rather high, its height equal to depth of body and 

 li times length of base of fin ; its origin nearer base of caudal than snout, 

 its free margin nearly vertical, straight; longest anal ray length of 

 base of fin ; ventral long, equal to height of dorsal, its length equal to 

 f of distance from ventral origin to vent; ventral origin midway 

 between base of caudal and pupil; adipose dorsal long and slender, 

 of same width throughout, its width \ its length. Mouth large, 

 the lower jaw projecting, the snout straight ; maxillary contained 3 times 

 in length of head, its posterior edge extending to line drawn vertically 

 through the anterior margin of pupil ; mandible i the length of 

 head, its angle under the pupil. Teeth present on the tongue. Color 

 above grayish silvery, sides bright silvery ; below white ; tips of dorsal 

 and caudal dark. Length 10 inches. Lakes of central New York, known 

 from Seneca Lake and Skaneateles Lake. (Smith.) (Osmerus, a smelt, 

 forma, form ; in allusion to the general shape of the fish, which is known 

 as " smelt" in parts of New York.) 



Coregonus hoyi, BEAN, Proc. TJ. S. Nat. Mus., 1882, 658, not of GILL; GOODE, Hist. Aquatic 



Animals, pi. 197 B, 1884 ; not of text. 

 Coregonus osmeriformis, HUGH M. SMITH, Bull. U. S. Fish Comm., xiv, 1894, pi. 1, 2, Seneca 



Lake and Skaneateles Lake, New York. (Type, Nos. 32162 and 32165. Coll. Prof. H. 



L. Smith and J. C. Willetts.) 



764. ARGYROSOMUS ARTEDI (Le Sueur). 

 (Cisco ; LAKE HERRING ; MICHIGAN HERRING.) 



Head 4| ; depth 4|; eye 4 to 4. D. 10; A. 12; scales 8-75 to 90-7, 10 

 rows under base of dorsal ; vertebrae about 60. Body elongate, com- 

 pressed, not elevated. Head compressed, somewhat pointed, rather long, 

 the distance from occiput to tip of snout usually a little less than half 

 the distance from occiput to dorsal fin. Mouth rather large, the maxil- 

 lary reaching not quite to the middle of the pupil, 3i to 3 in head ; 

 the mandible 2 in head. Preorbital bone long and slender ; suborbital 

 broad ; supraorbital nearly as long as eye, about four times as long as broad. 

 Gill rakers very long and slender, as in Clupea, 15 to 17 -f- 28 to 34, the 

 longest If in eye. Dorsal fin high, its rays rapidly shortened. Bluish 

 black or greenish above; sides silvery, scales with dark specks; fine 

 mostly pale, the lower dusky-tinged. Length 12 inches. Great Lakes 

 and neighboring waters, not in Alaska nor Arctic America ; very abun- 

 dant, usually frequenting shallow waters. An active, voracious fish, 

 valued as food. (Named for Petrus Artedi, the " Father of Ichthyology," 



