102 THE NAUTILUS. 
rhoadsi from V.carolinensis. Alt. 2.5, diam. 4.8 mm.. or some- 
what smaller. 
Distribution, mainly along the Blue Ridge and for some distance 
each side of it, and south to the Great Smokies. It is lacking, so far 
as we know, in New York, Ohio, the whole trans-Alleghanian region 
and the Gulf States, where V. ‘ndentata is of common occurrence. 
Special localities are as follows : 
Connecticut: W. Granby, Hartford County (Benton HHoleouine 
New Jersey: White Pond, Warren County (Pilsbry & Rhoads, 
type locality). 
Pennsylvania: Yop of High Knob, Pike County (S. N. Rhoads) ; 
Philadelphia (Tryon) ; Monterey, Adams County (Pilsbry) ; Fulton 
County (C. W. Johnson ). 
Maryland: Cumberland (Howard Shriver). 
West Virginia: Wirt County (William J, Fox). 
North Carolina: ‘* Roandale Farm,” near Magnetic City (A. G 
Wetherby). ; 
Tennessee: Roe’s Flat, Cade’s Cove, in the Great Smoky Moun- 
tains (James H. Ferriss). 
This Vitrea seems to be especially characteristic of the somewhat 
mountainous northern portion of New Jersey and Pennsylvania tra- 
versed by the Blue Ridge. It often occurs associated with typical V. 
indentata, from which it is perfectly easy to separate it by the well- 
marked umbilicus. The series before me shows constantly the dif- 
ferences mentioned above, with no intergradation whatever, even when 
rhoadsé oceurs with indentatus. 
It is named in honor of Mr. 8. N. Rhoads. who collected the types 
with the writer. Mr. Rhoads found it also in Pike County, Pennsyl- 
vania. 
Probably the “ variety with an open wmbilicus,” which Mr. Binney 
mentions without a under Z. indentatus (Manual of American 
Land Shells, Bull. U.S. Nat. Mus. No. 28, p. 63, p. 17) is this form. 
Collectors who will a through their series of TV. indentata and 
V. hammonis from the region indicated above will probably find speci- 
mens of VW. rhoads/. It is much easier to separate from ‘ndentata than 
carolinensis is. 
VITREA INDENTATA AND VARITETIES. 
The widely distributed V. éxdentata varies from distinctly perforate to 
a scarcely punctured condition. In Say’s types the perforation may be 
