8 
bulletin of the bureau of fisheries. 
form, and in general by the still smaller adipose fin. But these characters are average only, and are 
subject to much variation, hence we refrain from regarding the Lake Superior herring as a distinct 
species. Specimens having these characters were taken at Sault Ste. Marie, both above the Rapids 
(Point aux Pins) and below (St. Marys River). Specimens exactly similar were secured from Peter 
Anderson, a fisherman at Marquette. These are rather larger than the specimens from Collingwood, 
but exactly like them in form and color. The figure of Evermann & Smith taken from a specimen 
from Bayfield, Wis., seems to be the same, although named Argyrosomus artedi in their plate. 
Fig. 3 . — Leucichthys harengus (Richardson). Saginaw Bay herring. (Drawn from a young exam- 
ple, 9 inches long, collected in Blind River, North Channel, Lake Huron.) 
In the work of the International Fisheries Commission it was claimed by the fishermen about Duluth 
that a mesh of less than 2.5 inches was necessary for the capture of the lake herring. The fishermen 
about Marquette were entirely satisfied with this mesh. It was claimed at Duluth that the herring 
there were more slender than those to the eastward of Keweenaw Point. Examination of specimens 
shows this to be true. The lake herring examined from Duluth, Knife River, Port Arthur, and all 
points on the northwest shore of Lake Superior, are more slender, less compressed, and more spindle- 
shaped than those from Georgian Bay and Marquette. On a single specimen no great difference is 
shown, but in a boat load of herring it is notable. Possibly the difference is due to scantier food on 
Fig. 4 . — Leucichthys harengus arclurus Jordan & Evermann, new subspecies. (Drawn from 
the type, a specimen 1 1.5 inches long, collected in Knife River, Lake Superior, near Duluth.) 
the narrow rocky shelf inhabited by these fishes along the north shore. Possibly it has a certain taxo- 
nomic value. The lake herring is a shore fish, and the great depth of the waters of Lake Superior more 
or less completely isolates the fishes of Isle Royale and neighboring shores from those of the eastern 
and southern part of the lake. 
We present a figure of a specimen from Knife River, near Duluth, typical of the subspecies which 
we call Leucichthys harengus arcturus. This form agrees exactly with the ordinary harengus of Geor- 
gian Bay in the small size of the adipose fin. The fishes from Michipicoten Island (“ the Pic ”) in Lake 
Superior, called by Agassiz Coregonus albus, may belong to this slender type. 
