THIRTEENTH ANNUAL MEETING. 39 
Great lakes and northeastward to Labrador, the eye becoming 
larger and certain other characters varying to the north- 
eastward. This species has considerable commercial impor- 
tance. 
12. Coregonus arted?, var. sisco Jordan Cisco. 
Small lakes of Michigan, Wisconsin, and Indiana. 
A form of the preceding modified by residence in small, deep 
lakes. 
13. Coregonus hoy? (Gill) Jordan. Lake moon-eye; Cisco (Lake 
Michigan); Smelt (Western New York). 
Lake Michigan and Lake Ontario, in deep water; lakes of West- 
ern New York, where it sometimes dies mysteriously in 
great numbers, 
14. Coregonus merkiz Gunther, subsp. MVzlatosk¢ ciga (Russian). 
Known from Yukon river and Hotham Inlet, Alaska. 
A small species, thin and bony, rarely exceeding a half pound 
in weight; little used as food in Alaska. It differs from 
typical merkzz in several particulars. 
15. Coregonus lavaretus L. Marzene. 
Great lakes of Switzerland, Tyrol, Pomerania, Mecklenberg, and 
Sweden. 
This fine, large species, the type of the genus Coregonus, comes 
into the series containing our common white- fish (C. clupetformis). 
It has about thirty gill-rakers of moderate length, and the lower 
jaw is included. In sizeand in extent of distribution as well as 
in amount of variation, as expressed by the numerous synonymes 
of the name /avaretus, the two bear a strong resemblance to each 
other. The marzne in its adult condition is readily distinguish- 
ed at sight by its numerous and rather deep scales; but I suspect 
that it will be difficult to separate the young of the two, espe- 
cially since we have common white-fish from Lake Superior 
with as many as ninety scales, the usual number in some of the 
variations of /avaretus. 
Four hundred and nine were placed April 14th, 1877, in Lake 
Gardner, Otsego Co., Michigan. The history of the marzne 
since its introduction into America by the U. S. Fish Commis- 
sioner is not known to me. 
