[39] FISHERIES OF THE UNITED STATES. 1193 



Whitefish. — Coregonus clupeiformis Le S. — Continued. 



abounds in all of the Great Lakes, and its spawning- grounds 

 are quite generally distributed. The spawning season lasts 

 from October to January. A 5-pound female is estimated to 

 to yield 25,000 to 30,000 eggs. Not less than 50,000,000 were- 

 hatched by the U. S. Fish Commission in the spring of 1883. 



Whitefish. — Coregonus clupeiformis Le S. 



Spent ovaries. Ecorse, Mich. 10,489. J. W. Milner. 



Siscowet trout. — Salvelinus namaycitsh, var. siscotvet Ag. 



Fragments of ovaries. Specimen estimated to contain 2,796 eggs 

 in a well developed condition. Outer Islands, Lake Superior. 

 10,493. This species spawns in the shore- waters of the Great 

 Lakes, Lake Superior containing the most important spawning- 

 grounds. 



MACKINAW trout. — Salvelinus namaycush (Penn.) Goode. 



Ovaries. This specimen, which is estimated to contain 14,943 

 eggs, was taken from a fish weighing 24 pounds. Shoal Isl- 

 ands, Lake Superior. 10,495. James W. Milner. This species 

 breeds in the waters of the Great Lakes where it is quite abun- 

 dant. The spawning season begins in October and lasts till the 

 middle of November. Fish of average size will yield from 

 2,000 to 10,000 eggs, which, in water of 38° Fahr., will hatch, 

 in 70 to 80 days. 



Mummichoo. — Ftmdulus pisculentus (Mitch.) Yal. 



Ovaries. ^Wood's Holl, Mass., June 5. 1872. 10,505. 



Tautoo. — Tautoga onitis (Linn.) Giinther. 



Ovaries. Wood's Holl, Mass., July 5, 1872. 10,516. Vinal N. 

 Edwards. This species spawns on the rocky ledges off the 

 coast of Southern Sew England and New Jersey during the 

 summer months. 



Striped sea-robin. — Prionotus evolans (Linn.) Gill. 



Ovaries. Wood's Holl, Mass., May 25, 1872. 10,530. Yinal N. 

 Edwards. This species spawns in various portions of the At- 

 lantic coast, between Cape Cod and Florida, in summer. 



SOUP, or scuppaug. — Stenotomus chrysops (L.) Bean. 



Ovaries. Wood's Holl, Mass., June, 1872. 10,531. Yinal N. Ed- 

 wards. The principal spawning grounds of this species are 

 along the coast of Southern New England. 



