6 
BULLETIN of the bureau of fisheries. 
Allosomus: 
on. Caudal peduncle short and thick, its length along lateral line above last ray of anal about 
half head, its length from last ray of anal to first of caudal less than its depth; skeleton and 
flesh firm; scales dusky, firmly inserted; body deep, compressed, the depth 2.25 to 3.4 in 
length; no teeth. Colors dark, back and fins dusky. 
m. Depth 3.2 to 3.33 in length; adipose fin very small, shorter than eye; 
caudal peduncle moderate, its depth 2.5 in head manitoulinus 
mm. Depth 2.5 to 3 in length; adipose fin large, longer than eye; body 
short and deep; caudal .peduncle very short and deep, its depth 2 
to 2.25 in head tullibee 
The relationships of the species may be indicated graphically as follows: 
lucidus 
I 
arcturus / 
\/ 
harengus 
manitoulinus tullibee 
osmeriformis 
supernas 
I 
ho^'i 
zenithicus 
liuronius sisco 
I 
ontariensis 
prognathus cyanopterus 
artedi bisselli 
johannae nigripinnis enensis. 
Subgenus THRISSOMIMUS Gill. 
Leucichthys harengus (Richardson). Saginaw Bay Herring; Georgian Bay Herring. 
Salmo ( Coregonus ) harengus Richardson. Fauna Boreali-Americana, hi. p. 210, pi. xc, fig. 2. 1836, Georgian 
Bay at Penetanguishene, Ontario. 
Coregonus clupeiformis, Agassiz, Lake Superior, p. 339, 1850, the Pic (Michipicoten Island); not of Mitchill. 
Coregonus albus, Agassiz, op. cit., p. 342, the Pic; not of Le Sueur. 
Argyrosomus artedi, Evermann & Smith, Rept. U. S. Fish Comm. 1894, p. 305, pi. 21, in part, Bayfield, Wis. 
Distribution : Bays and shallow waters of Lake Huron and Lake Michigan ; Georgian Bay, Saginaw 
Bay, Green Bay, etc. 
The herring of Georgian Bay, hitherto confounded with Leucichthys artedi, is a distinct species, well 
separated from all the other species of this group found in the Great Lakes by the very small adipose 
fin, length of which is about 5 in head. This character is well shown in Richardson’s figure of the species. 
In form the Georgian Bay herring is much more slender than L. artedi, approaching in that regard 
the herring of Lake Huron ( Leucichthys sisco huronius). As a food fish Leucichthys harengus is distinctly 
superior to either L. artedi or L. sisco huronius, though by no means equal to A. eriensis. 
Doctor Richardson’s specimens came from Penetanguishene at the southern end of Georgian Bay. 
We obtained many specimens from the neighboring port of Collingwood, one of which we have figured, 
and which is the type of the following description. This may be regarded as typical of Leucichthys 
harengus. We have seen specimens from near Mackinac which seem to belong to this species. 
The herring of Saginaw Bay is also in all respects identical with the specimens from Collingwood. 
It is not only slender, as usual in this species, but reaches only a small size, the average weight when 
mature being 6 ounces, those examined by us, from Bayport, ranging from 2.5 to 9.5 ounces. The 
maximum length is 12 inches and the usual from 9 to 10. 
A small copepod which Dr. Charles B. Wilson is describing as a new species of Lernseopoda is 
parasitic on the gills of the Saginaw Bay herring. 
