THE NAUTILUS. 93 
the individual,’ in which case we have an example of environment 
modifying the germ-plasm—the odds against the variation being 
only accidentally coincident with the changed environment being 
enormous. 
In 1889, the above-mentioned changes had taken place in the 
colony, but time was needed to show whether they would increase 
in number and degree; or whether, as seemed more probable, the 
old European varieties would eventually assert themselves, and 
swamp the rest. In either case, the result would be very interest- 
ing, and now that five years have elapsed, it is extremely desirable 
that some one should make a new investigation and report in detail. 
It is really astonishing that no one has yet done so. The colony 
was, in 1889, so evidently in a condition of unstable equilibrium, 
that it seems certain that changes must have occurred in the inter- 
val, tending to the predominance either of the old or the new (split- 
band) type. 
Believing that Prof. Morrison would publish, I did not follow my 
paper of 1889 with further observations, but it will be as well now 
to put the following on record: 
(1) Lexington, Va., received from Morrison one of each of the 
following, Oct. 26, 1889 : 
Helix nemoralis mut. guetturdia Moq. 
Helix nemoralis mut. arcelinia Loe. 
Helix nemoralis mut. petiveria 10345 = requienia Mog. 
Helix nemoralis mut. libellula 1(234)5 Kregl. 
Helix nemoralis mut. libellula 123(,4)5 nov. 
Helix nemoralis mut. libellula 0030, Ckll. (juv.). 
Helix nemoralis mut. libellula 12,45 Ckll. 
Heliz nemoralis mut. libellula 1,25,(45) nov. (juv.). 
Helix nemorulis mut. libellula 12,3(45) nov. (juv.). 
(Morrison had another example.) 
Helix nemoralis mut. libellula 12,3(,,4)5 nov. 
(Morrison had another example.) 
Helix nemorvalis mut. libellula ,0,45 nov. (juv.). 
Helix nemoralis mut. libellula 123,45 nov. (juv.). 
Helix nemoralis mut. libellula ,234(5,) nov. (juv.). 
Helix nemoralis mut. libellula 123,45 nov. 
Helix nemoralis mut. libellula 12,.3,,45 nov. 
Helix nemoralis mut. libellula 003,5 Ckll. 
Tf so acquired, it must be in very early life, as, in many instances, the vari- 
ations were recorded from immature examples. 
