Annual Meeting.] 
434 
[May 4, 
able to employ some person to take the place of the regular guide 
during these two months of vacation. 
In the early part of the year a change was made which greatly 
increased the efficiency of the work in this department. Notices 
were posted that the guide would conduct parties through the 
Museum, meeting them in the vestibule at stated hours on public 
days. This resulted in giving about six peripatetic lectures per 
week to limited but interested audiences. 
Whenever the number of visitors at the Museum is slight, as it 
often is in bad weather, the guide devotes himself to the small 
parties that may be gathered in the vestibule and sometimes makes 
as many as ten explanatory trips through the collections in one 
day. 
Dynamical Zoology. 
Miss E. D. Board man has selected a series of the Steinheim 
shells out of the Curator’s collection from this locality to illustrate 
the evolution of the different species of Planorbidae at this famous 
locality. This has been mounted by Miss Martin and with the 
accompanying plate of magnified figures of the same shells gives 
a duplicate of the same series as published by the Curator in his 
k ‘Genesis of the Tertiary species of Planorbis at Steinheim.” 
The series of mollusca picked out by Dr. Jackson last year to 
illustrate geomalism has been mounted and placed on exhibition 
by Mr. Henshaw. The Curator has given all the time that could 
be spared from his routine work and more pressing duties to the 
study of the Gulick collection but nothing has yet been mounted. 
Geology. 
A successful effort has been made to secure the publication of 
the Guide to the collections in the Vestibule and Room B, illus- 
trating Dynamical Geology and Petrography, the completion of 
which was announced last year. The state of the Society’s treas- 
ury not permitting an appropriation to be made for this purpose, 
a circular was issued inviting subscriptions to a special edition of 
the Guide at one dollar per copy. At the end of six months 111 
persons had subscribed for 173 copies; and the expenses for 
printing and postage had amounted to $35, the net return being 
$138. This resource being exhausted, and scarcely one third of 
