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Bulletin Wisconsin Natural History Society [Vol. 13, No. 1 
some. Sex is therefore determined by which type of male cell fuses with 
the egg cell. But in birds and echinoderms, it is the female that has the 
dimorphic chromosomes. 
The speaker also gave an account of some of his own investigations on 
the subject, especially those on a species of armadillo, specimens of which 
were collected in Texas. 
At the conclusion of the lecture, Professor Newman was tendered a vote 
of thanks by the society. 
The meeting then adjourned. 
Milwaukee, Wis., April 30, 1914. 
Meeting of the combined sections. 
Mr. Teller in the chair. Seven persons present. Minutes of last meeting 
read and approved. 
A number of topics were discussed by those present. 
An exhibit of fossils from the Hamilton formation at Arkona, Ontario, 
was made by Mr. Teller. The specimens shown were chiefly corals and 
crinoids. 
The meeting then adjourned. 
Milwaukee, Wis., May 14, 1914. 
Meeting of the combined sections. 
President Barth in the chair. Eleven persons present. Minutes of last 
meeting read and approved. 
The president asked for expressions as to the advisability of holding 
an annual banquet for the present year. The general concensus of opinion 
was that it would be best to omit this function. 
Mr. Teller called attention to the recent change in nomenclature of some 
fossils of the genus Dicklocephalus, which now becomes Saukia. He showed 
type specimens, which were collected in Sauk County, and upon which the 
original descriptions of the species lodensis and crassimarginatus were 
based. 
Dr. Sherman answered a number of inquiries as to the identity and edi- 
bility of certain mushrooms. 
Then followed an interesting discussion, participated in by Messrs. 
Barth, Finger and Teller, of the former ecological conditions in the region 
about Milwaukee, especially of the tamarack swamp areas. 
Mr. Heddle exhibited two botanical specimens recently added to the 
herbarium of the Public Museum: Dwarf Trillium ( T . nivale), collected 
by Mr. J. M. W. Pratt in town of Milwaukee (the second reported locality 
for Milwaukee Co.) ; and Speckled Alder ( Alnus incana), collected in flower 
by Mr. A. Brown, in town of Wauwatosa, at the early date of January 25, 
1914. 
The meeting then adjourned. 
