920 THE AMERICAN NATURALIST. [Vou. XXXII, 
apparent. The number of varieties in the “ C” series is 139, 
and 113 in each of the other two. 
As regards the effect of large destruction of the animals, 
little difference is apparent in proportions in series “4” and 
«B? In 1897 the snails were gathered quite closely, and in 
1898 they were far less abundant ; indeed, considerable difficulty 
was realized in completing the series. 
In this connection an interesting fact has been communi- 
cated to me by Major Morrison. In sending out snails for new 
colonies, a number of half-grown bandless specimens were sent 
to Blairstown, Pa. This is the only colony which has been 
heard from and shows a preponderance of banded varieties. 
This colony gives an interesting example of the results of a 
tendency to variation in a favorable environment. As far as I 
have been able to learn, the helix has no enemies. A few 
broken shells in a hen yard showed that chickens are acquiring 
a method of getting the animal from the shell. From my 
experience in collecting the snails, I should not be able to 
deny a certain apparent tendency to mimicry, if it were 
asserted ; but I should hardly dare assert it. In one locality, 
quite protected from the light, there seemed to be a preponder- 
ance of darker shells and fused bands ; among the honeysuckle 
undergrowth full-banded varieties were more abundant and not 
easy to see; in more than one locality among yellow leaves, the 
yellow bandless variety, or 00300, was common. It may have 
been imagination, but the idea of mimicry suggested itself. 
In conclusion, I must acknowledge my indebtedness to Pro- 
fessor Cockerell for all of value there may be in this paper, but 
exonerate him from all responsibility for its shortcomings. 
To this paper is appended a list of all the varieties known in 
the Lexington colony. Those specimens which have not been 
previously described in this colony are marked with * and 
among these, those of which more than one specimen has been 
found also with f. 
WASHINGTON AND LEE UNIVERSITY, 
LEXINGTON, VA., August 25, 1898. 
