882 FISHES — SALMONID^. 



Habitat. Lak& Micbigac, Lake Sapeiior ; one specimen in the National Maeeum from 

 Lake Ontario. Said to occur in small lakes in the interior ot Michigan. 



Diagnosis. — This species may be known from the Lake Herring,, which 

 it resembles in form, by the shortness of its lower jaw, which fits within 

 the upper, as in the White-fish, and by the pure silvery luster of the scales, 

 which have none of the dusky punctulations as in the other Coregoni. 



Habits. — Little is known of the habits of this Cisco. Dr. Hoy, its dis- 

 coverer, writes, " This little beauty never approaches shoal water, where 

 Argyrosamus clupeiformis (artedi) is only found. About 30 or 40 fathoms 

 is as near shore as it has ever been captured here." (Racine, Wisconsin.) 



Prof. Milner observes, "The Cisco of Lake Michigan, not to be con- 

 founded with the Cisco of Lake Ontario, is a fish frequenting the deep 

 waters. It is taken in considerable quantities at depths of from 30 to 

 70 fathoms, and is the principal food of the Salmon or "Mackinaw 

 Trout." Piof. Milner further remarks that the depth of 50 fathoms 

 " may be considered in the deeper lakes the zone of the Mackinaw Trout 

 and of the Cisco throughout the spring, summer, and fall, with the ex- 

 ception, in the case of the Trout, of the spawning season." 



96. CoEEGONUs ARTEDI LeSueur. 

 Lake Herring-; Micliig-an Herring:; Cisco. 



Coregmus arteiSi, LeSukue, Journ. Acad. Nat. Sci. Phila , i, 1818, 231. — Jordan, Man. 



Vert. 2d Ed., 274. 

 Cortgonus clupeiformis, DeKay, New York Fauna, Fish., 1842, 248, pi. 60, f. 198.— GuN- 

 THBR, Cat. Fish. Brit. Mue., vi, 198, and of many recent authors (not Salmo elu- 

 peiforrms, Mitch.). 

 Argyrosomus clupeiformis, Milner, Rept. U. S. Fish Comm., 1872-3, 65, and of most rec- 

 ent American writers. 

 Salmo {Coregorms) lucidus, Eichareson, Fauna Bor.-Am., 1836, iii, 207. 

 Salmo {Coregonus) harengua, Richardson, Fauna Bor.-Amer., iii, 1836, 210. 

 Argyrosomus siaco, Jordan, Amer. Nat., 1875, 130. (Local variety in lakes of Indiana 

 and Wisconsin.) 

 Body elongate, compressed, little elevated; head compressed, rather pointed; month 

 rather large, the maxillary reaching about to the middle of the pupil, about "J in head, 

 the mandible SJ in head ; preorbital bone long and slender; suborbital broad ; supraor- 

 bital nearly as long as eye, about fonr times as long as broad; adipose fins very small ; 

 eye 4 to 5 in head ; gill-rakeis very long and slender, as long as eye, 25 to 30 below the 

 angle; bluish black or greenish above; sides silvery; scales with dark specks; fins 

 mostly pale ; pectoral and anal dusky-tinged ; head 4^ ; depth 4i ; D. 10 ; A. 11 ; scales 

 8-76 7. Length about a foot. The usual length is rather less than a foot, and the weight 

 9 to 10 ounces. The largest seen are about 19 inches long and two pounds in weight. 



Halitat, Great Lakes and northward to Alaska and Labrador j very abundant, usually 

 freqnenting shallow waters. In numerous small lakes in Indiana and Wisconsin (Ge- 

 neva, Tippecanoe, Ooonomowoo, LaBelle, etc.) is the modified var. sisco (Argyrosomus 

 eisco, Jordan, Amer. Nat,, 1875, 136), which lives in the deep waters, coming into shal- 

 low waters to spawn in December. 



