1907.] 
Proceedings. 
67 
reptile and its relatives, and gave his most recent views concerning 
the probable cause for the remarkable developments shov^^n by certain 
parts of the skeleton. The interesting geographical distribution of 
related Permian reptiles was also outlined. 
Mr. Ward then exhibited a series of weasel skins from Wisconsin. 
He referred critically to the various records of species of weasels occur- 
ring in the state. He showed a skin of Putorius rixosm allegheniensis 
(Ehoades) from Burlington, Wis., a record which widelj^ extends the 
known range of the species. 
Mr. Brues then referred to a recent deviation in zoological nomen- 
clature by a writer on a group of stony corals who considered it neces- 
sary to abandon binomial nomenclature and adopt a geographical series 
of names numbered according to the localities from which the species 
came. 
The meeting then adjourned. 
Milwaukee, Feb. 28, 1907. 
Eegular monthly meeting of the Society. 
President Teller in the chair, and about 75 members present. 
The minutes of the last regular meeting were read and approved. 
Mr. Teller reported that a committee consisting of Dr. Graenicher 
and himself had called upon the Mayor regarding the appointriient of a 
trustee for the Public Museum. 
The secretary read an invitation from the seventh international 
congress of Zoologists for the society to be represented by delegates 
at its Boston meeting in August in 1907. 
There being no further business. Prof. S. W. Williston of the 
University of Chicago, delivered a lecture on the phylogeny of the 
Elephant. 
The lecturer described with the aid of lantern slides the evolutional 
development of the Proboscidea to the modern elephants from the ear- 
liest known forms, recently discovered in Egypt, with the upper and 
lower incisors or tusks adapted for gnawing after the manner of rodents. 
The lower pair was gradually lost, while the upper ones became greatly 
increased in size. Their geographical migrations from Africa, through 
Europe to North America in recent times, and finally to South America, 
through the open land communication of the northwest and the 
Isthmus of Panama were traced. The numerous species inhabiting 
North America since late ISIiocene times were discussed, with a brief 
