314 



BULLETIN OF THE BUREAU OF FISHERIES 



Kendall, W. C, 1903. — Coregonus stanleyi from the thoroughfare between Mud and Cross 

 Lakes, Me., is described and figured as a new species. 



Jordan, D. S., and B. W. Evermann, 1909. — Argyrosomus eriensis and huronius from Port 

 Stanley, Lake Erie, and A. zenithicus from Duluth, Lake Superior, are described and figured. The 

 synonomy of clupeaformis and albus is appended. 



Jordan, D. S., and J. 0. Snyder, 1909. — Coregonus oregonius is described from the McKenzie 

 River, Oreg. The species was included in part in the description of C. williamsoni by N. B. Scofield, 

 1899, page 463. 



Wagner, George, 1910. — Argyrosomus johannse is described from specimens secured in Lake 

 Michigan some 18 miles out from Racine, Wis., at a depth of 25 fathoms. 



Jordan, D. S., and B. W. Evermann, 1911. — Most of the literature on the coregonids is reviewed 

 and the species in the Great Lakes redescribed. Five new forms of Leucichthys are added to the 

 fauna — supernas and harengus arcturus from Lake Superior near Duluth, cyanopterus from Lake 

 Superior off Marquette, manitoulinus from the North Channel off Blind River, and ontariensis from 

 Lake Ontario off Deseronto. All the Great Lakes species except prognathus are figured. Six of the 

 illustrations are from paintings. 



Wagner, George, 1911. — Leucichthys birgei is described from Green Lake, Wis. 



Bean, T. H., 1916. — Leucichthys macropterus is described from a specimen obtained in Lake 



Erie. 



Harper, F., and J. T. Nichols, 1919. — Of the six species described, four are whitefishes — Core- 

 gonus preblei from Tazin River, about 1 mile above its confluence with the Taltson R'ver, Mac- 

 kenzie, Canada (with photograph) ; Leucichthys entomophagus from Tazin River, Mackenzie, Canada; 

 L. athabascse from Lake Athabasca, at the mouth of Chariot River, northern Saskatchewan, Canada; 

 and L. macrognathus from the shore waters of Great Slave Lake, near Fort Resolution, Mackenzie, 

 Canada. 



Jordan, D. S., 1918. — The genus Irillion is proposed with Coregonus oregonius as the type. 



Snyder, J. 0., 1919. — Leucichthys gemmifer, Coregonus spilonotus, and Coregonus abyssicola 

 are described from specimens secured in Bear Lake near Fish Haven, Idaho. Each species is 

 figured. 



Koelz, W., 1921. — Leucichthys kiyi is described as a new species from Lake Michigan off Stur- 

 geon Bay, Wis. 



Koelz, W., 1924- — Leucichthys alpense is described from Lake Michigan off Charlevoix, Mich., 

 and Leucichthys reighardi from off Michigan City, Ind. 



Koelz, W., 1925. — Leucichthys nipigon is described from Lake Nipigon. 



Dymond, J. R-, 1926. — A very good systematic account is given of the species of Coregonidse 

 that inhabit Lake Nipigon. 



Hubbs, C. L., 1926. — In this check list a preliminary outline is given of the systematic arrange- 

 ment of coregonids followed in this paper. 



VARIABILITY AND DETERMINATION OF SPECIES IN THE GREAT LAKES 



COREGONIDS 



GENERAL STATEMENT 



Smitt (1895, p. 827) says of the Salmonidae (which in his arrangement include 

 the coregonids), "there is hardly any other part of the system where the scientist 

 is confronted with such difficulties in defining the limits of the species." Any sys- 

 tematist who knows the Salmonidse, or only the Coregonidse, will agree with Smitt. 

 The descriptions of the coregonids in the early days of taxonomy were very vague 

 and were simply general remarks about shape, size, and color; or, if they were more 

 specific, they emphasized insignificant details. The best workers of the nineteenth 

 century, up' to 1882, confined themselves in their diagnoses to purely external charac- 

 ters. Niisslin (1882) calls attention to this fact and cites as an example the work 

 of Nilsson, Cuvier and Valenciennes, Siebold, and Giinther. He shows that two 



