94 THE NAUTILUS. 
VALLONIA AMERICANA Ancey ms.—The description of this has 
been published by Dr. Sterki in Proc. Acad. Nat. Sci. Phila., 1893, 
p. 266. The locality of Ancey’s types, however, is not stated, so it 
seems desirable to record that they were from Davenport, Towa, col- 
lected by Professor D.S. Sheldon. V. parvula, it will be noticed, 
is recorded by Sterki from the same locality. It may be added that 
I saw Ancey’s MS. description in May, 1890.—T. D. A. Cockerell. 
SrROBILA HUBBARDI.—Noting your comments on S. labyrinthica 
and vars., suggested to me the idea of comparing them with S. hub- 
bardi. 
There is evidently a close affinity between the two species, and 
the same tendency to variation in the number of teeth. I find in 
the Hubbardi three constant teeth, but in nearly one-half of our 
collection of several hundred there is an extra tooth between the 
second and third tooth counting from the umbilicus, and in some 
eases a fifth tooth beyond the third. The variety S. strebeli found 
here in our locality is also an approach to S. hubbardi in its de- 
pressed spire and dark color. They are also found in similar sta- 
tions often together under the bark of old logs or on palmetto trees, 
hidden in dirt or old rubbish. Hubbardi is a very shy snail, and I 
have spent many days looking for them. At first I thought three 
or four a good day’s find-—-G. W. Webster. 
VITRINA LIMPIDA IN PENNSYLYANIA.—In my note on Vitrina 
limpida Gld. in Pennsylvania which you published in the August 
Nauti us, I promised to report the results of future visits to the 
place where the shells were found. I went down yesterday after- 
noon and found 24 living shells, and as I could only go over a very 
small portion of the hollow, owing to a very heavy growth of nettles, © 
brambles and other noxious weeds, I think the shells must be very 
plenty—in fact, I do not think I “ worked” over two or three 
square yards at the most. * * * 4 
In continuation of my letter of October 2: On the 8th inst. I 
again visited the place where I found the Vitrina limpida Gld., and 
got 38 living specimens in about one and one-half hours, and went 
over exactly the same ground as in my former visit, though 
this time the space worked over was less than on October 1. The 
colony appears to be in a very flourishing condition, although dead 
shells are very plenty. * * * * 
