THE NAUTILUS. 5 
in the smaller Gastrodontas, although I have never seen more than 
one tooth on the same radius. But, as said, in some they are in the 
form of radial bars, and when two or three are present they are 
always of the same character, either round or transverse. Two 
examples, mature or nearly so, but weathered and opaque, have at 
least one distinct round deposit each, about 3 volution above the 
aperture. In the specimens from the valley, about a dozen in 
“number, varying from young to large, and by the way a few of 
them with very high spire, there is not a trace of teeth to be seen. 
This is certainly a very interesting fact, and the character 
described could mean a different species, and for the Nouvelle Ecole 
would be sufficient to establish a new genus. But as the shell is, in 
all other regards, formed like that of typical C. fulvus, we have to 
regard it as a variety of that species, the more so since in the lot 
there are a few examples without teeth and differing in no way from 
the type. This, and the variation in number, shape and size, show 
it to be a newly acquired character, which some time may be that of 
a distinct species. 
It remains to know whether the form be found also in other 
places of our country—which is quite probable—and to ascertain 
also the nature of the localities where it lives. Another question is 
whether it also inhabits the Old Continent. 
It may be mentioned here also that there are two different forms 
of the common C. fulvus, one more pale horn, the other deep wine 
or amber colored, and there are also differences in surface sculpture. 
It would be of interest to know how far these forms are constant 
and in correspondence with the nature of their habitats. I have 
seen them in both Europe and North America. 
New Philadelphia, O., March 21, ’93. 
POLYGYRA SUBPALLIATA, N. SP. 
BY H. A/BESERY- 
Some time ago the writer received from Prof. A. G. Wetherby, a 
suite of the land-snails found at his home, “ Roandale Farm,” Mag- 
netic City, North Carolina; and with them a letter giving the col- 
lector’s impressions and conclusions in regard to some, and queries 
