26 THE NAUTILUS. 
ing downward, we find in Fulgur coronatum var. rugosum Conrad, 
from the Miocene of St. Mary’s, Md., its probable ancestor. 
F. canaliculatum exhibits but little variation in the recent fauna, 
except in point of size, southern specimens becoming much smaller. 
Thus, at St. Augustine, Florida, the largest shells found are not 
over half the dimensions of the largest from the New Jersey coast. 
The typical form of this species is shown in fig. 2. Mr. James A. 
Fic, 2. Fulgur canaliculatum’ Say. 
canal indicates that the present canal was formed entirely after the 
abnormal condition set in, and}is not a case of shell fracture and 
subsequent “ patching” of the$pieces, such as is often found. It is 
probable that the columellar sideffof the canal in the half-grown 
individual was injured, both softfand hard parts being affected ; the 
mantle lining of the outer lip}and base of canal being unhurt. 
Harkins, of Atlantic City, 
has called our attention to 
a remarkabledeformed 
specimen, which he found 
at that locality, illustrated 
in fig. 1. It is an adult of 
average size, in which the 
basal canal is twisted to 
the left at a right angle to 
the axis of the shell. The 
growth-lines are ever y- 
where unbroken, no evi- 
dence of an early fracture 
being visible, either outside 
or within the aperture. 
There is an abnormal lump 
or callus upon the upper 
part of the columella, prob- 
ably deposited to fill some 
space left by the altered 
position of the soft parts 
in the cavity. 
It is difficult to say how 
a monster of this sort was 
produced. The unbroken 
sweep of the growth-striz 
from body-whorl upon the 
