106 THE NAUTILUS. 
NOTES AND NEWS. 
The Conchologists Exchange was started so oddly (on a postal 
card) and ended so abruptly—and without an index to either vol- 
ume, that we are constantly receiving letters of inquiry regarding 
its contents, numbers, etc. We once proposed to make a reprint, 
but could not obtain sufficient subseribers to warrant it. We now 
propose to print an index of both volumes, if enough of our sub- 
eribers want it to pay for the cost of printing. The index will 
contain a list of contributors with the titles of their articles, and 
a list of the species mentioned. Those wishing an Index will 
please send twenty-five cents to the Editors. It will be printed as 
soon as sufficient money is received-—H. A. P. and C. W. J. 
There is being built at Finderne, N. J., a large Casino Building, 
one room of which is to be devoted to Natural History. Mr. 
Thomas Morgan, of Somerville, N. J., has been appointed Curator. 
He intends placing there his entire collection. Any donation of 
specimens will be thankfully received. 
Derap Syatis.—On the 14th of last April, (1894), I turned over 
a log in the woods in Miami Co., Ohio, and found, all in «a heap, 
the following shells: 74 adult Helix elevata, 38 young of same, 1 
H. profunda, 9 H. alternata, 1 H. albolabrisand 2 H. hirsuta, mak- 
ing in all 125 individuals. They were all dead but well preserved, 
and many were clean inside so that they would make good cabinet 
specimens. Besides these perfect shells there were many so broken 
that they could not be readily identified. 
How can we explain this? Did these mollusks seek the warmth 
to be derived from a number huddling together, or were they acted 
upon by the common impulse of protection? Were they destroyed 
by insects, or did they perish by the cold? The preceding winter 
was an unusually mild one, and the size of the log and quantity of 
leaves which surrounded them would preclude the latter theory. 
The fact that so many were so thoroughly cleaned inside would seem 
to show that some insects as ants had made an attack upon them 
and eaten them. What are the enemies of our commonsnails? I 
have often found perfectly clean dead shells under logs—G. D. 
Lind, Lebanon, Ohio. ss 
An interesting study of Scissuredlu, illustrated with figures of the 
living animal and dentition, by A. Vayssiére, of Marseilles, is pub- 
