54 
be distinguished the same fat globules which packed the cyto- 
plasm of the cells. 
All in all, there seems to be exhibited here a rather remark- 
able set of cytologic facts confirming the suggestion made above 
that associated with this atrophy of the alimentary tract of the 
adult insect there is formed an adaptive organ of absorption by 
which the reserve fat of the larva becomes available as a source 
of energy to the adult. And it should be noted that even the mal- 
pighian tubules apparently participate in this work of absorption, 
their epithelium likewise becoming charged with fat drops. 
Mr. Horace W. Britcher next spoke about 
PROTECTIVE, MIMICRY AMONG THE SPIDERS. 
NOVEMBER 17, 1899. 
THIRTY-FIFTH REGULAR MEETING. 
The president, Dr. JouN Van Duyv, in the chair. 
About one hundred and fifty persons present. 
The speaker of the evening, Dr. J. M. Clarke, gave a most 
interesting address, entitled: 
THE NEW GEOLOGIC NOMENCLATURE.* 
He began by describing the early history of the New York 
State geological survey. The state was divided into four sections 
and each given into the hands of a competent geologist to survey. 
Onondaga county was in the third division and was under the 
supervision of Geologist L. Vanuxem, and the early study which 
it received was second to none in the state. Dr. Clarke gradually 
led up to the reasons for a new nomenclature and then explained 
* For complete description see Science for December 15, 1899, pp. 874-875 
