THE NAUTILUS. O 



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 i 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, 0., March 21, '93. 



POLYGYRA SUBPALLIATA, N. SP. 



BY H. A. PILSBRY. 



Some time ago the writer received from Prof A. G. AVetherby, 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 



