1<)1_> THE NAUTILUS. 



r-hoadsi t'rnui V.carolinerisfs. Alt. 2.5. diam. 4.x mm.. <>r some- 

 what smaller. 



Distribution, mainly along the Blue .Ridge and Tor some distance 

 each side of it, and south to the Great Smokies. Ft is lacking, so far 

 as we know, in New York, Ohio, the whole trans- Alleghaniau region 

 ;md the Gulf States, where V. hxlrntafa is of common occurrence. 

 Special localities are as follows : 



Connecticut: W. Granby. Hartford County (Benton Holeomb). 



New Jersey : White Pond. Warren County ( Pilsbry & Rhoads. 

 type locality). 



Pennsylvania : Top of High Knob, Pike County (S. N. Rhoads) ; 

 Philadelphia (Try on) ; 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 Vftrea 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. 



tndentata, 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 

 rhoadsi occurs with indentatus. 



Tt is named in honor of Mr. S. 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 umbilicus/' which Mr. Binncy 

 mentions without locality under Z. indentafus (Manual of American 

 Land Shells, Bull. U. S. Nat. Mus. No. 28, p. 63, p. 17) is this form. 



Collectors who will look through their series of 1". hidentata and 

 T'. hammonis from the region iudica f ed above will probably find speci- 

 mens of V.rhondxf. Tt is much easier to separate from indfiifafa, than 

 cftroh'nensis is. 



V1TREA INDENT ATA AND VARIETIES. 



The widely distributed V. imlcntata varies from distinctly perforate to 

 a scarcely punctured condition. In Say's types the perforation mav be 



