EIGHTH REPORT 
Of the Colorado Siologieal 
Association. 
EDITED BY THE SECRETARY. 
NEW MEMBERS. 
(32.) Dennis Gale, Gold Hill. 
Colorado. 
(33*) Dr. C. H. Merriam, Ornithol- 
ogist and Mammalogist to the U. S. 
Department of Agriculture, Washing- 
ton, D. C. 
(34 ) I. Parker Norris, Editor of 
Oological Department of ‘’Ornitholo- 
gist and Oologist," 723 Walnut Street, 
Philadelphia, Pennsylvania. 
the library. 
Through the kindness of Prof. 
Packard, we have received a copy of 
Bulletin 7 of the U. S. Entomological 
Commission, relating to insects ins 
jurious to forest and shade trees; and 
also notes on “Bot-fly maggots in a 
turtle’s neck,” and “Larvae of a fly in 
a hot'spring in Colorado,” both re- 
printed from “American Naturalist,” 
July, 1882. We have also to ac- 
knowledge with thanks the receipt of 
“Journal of Mycology” for 1887, from , 
Mr. J. B. Ellis. ( 
SNAILS AND SLUGS. 1 
Are there any snails and slugs in t 
Colorado? Probably if this question i 
were asked of all the people in the a 
sta.e, at least half of them would re- 1 
ply without hesitation “no.” Yet we s 
have about fifty kinds of snails in 
Colorado, and one species of slug-the 
1 * ast presenting three varieties. Most 
of them are small, and dull in color, 
and that is why they have been over- 
looked. 
The ground is frozen and covered 
with snow now, and we can hardly 
, find an y snails ; but let us anticipate 
events, and imagine it is summer, and 
that we are starting out to look for 
snails. We start from Westcliffe, and 
; go toward Grape creek, down the 
steep path near the mill. At the bot 
tom of the path is a swamp, and here 
a barrel full of water, which we exam- 
ine closely. Here is something in the 
water, sticking to the side of the bar- 
rel, and here another, and another— 
they are water-snails. Not much to 
look at, at first sight; dull brownish, 
pointed at the apex — but here is some- 
thing unusual, the mouth of the shell 
is on the left, and we know, or ought 
th know, that nearly all shells twist 
round to the right instead. It is by 
the sinistral turn of these water-snails 
that we know their genus, they be- 
long to the genus Physa, their full 
name being Physa helerostropha, of 
which they are a small variety. Ex= 
cept in the rarest cases, all those wat- 
er-snails whose shells turn to the left 
belong to the genus Physa, no excep- 
tions to this rule are known in Colo- 
rado. Leaving the Physse, we go on 
a little further, to a swamp about a 
hundred yards away, and look on the 
stems of grasses and other plants. 
*53 
