106 



MEMOIRS OF THE CARNEGIE MUSEUM. 



sylvania. Both shells are described as being large, flat, biangulate behind, while 

 northmn-ptonensis is said (Simpson, 1900, p. 728 footnote) to have in addition the 

 posterior point elevated above the base line. Such shells may be found anywhere 

 in Pennsylvania. Specimens from Hartford, Connecticut, one of the type localities 

 of northamptonensis, and which are in the Carnegie Museum, are in fact normal, 

 large representatives of E. violaceus. 



Unto fuliginosus Lea. This shell from Cobbs Creek, near Philadelphia, is 

 quoted twice by m\ son in 1900, first (p. 722) as synonym of complanatus, then 



Fig. 11. 



• Elliptis violaceus. 

 U Elliptis cicpreus. 

 + Elliptis fisherianus. 



(p. 727) as of iderinus Conrad; but in 1914 (p. 665) only the latter reference is 

 given. I do not know icterinus, which is southern. The fuliginosus Lea, however, 

 does not agree with the original description of icterinus (Conrad, Mon. 4, 1836, 

 PL 18, fig. 2), and I think, the first reference of Simpson is correct, and the Penn- 

 sylvanian fuliginosus is identical with E. violaceus. 



Localities in Pennsylvania represented in the Carnegie Museum: 



Delaware-drainage : 

 Delaware River, Penns Manor and Yardley, Bucks Co.; Shawnee, Monroe Co. 

 White Clay Creek, Avondale, Chester Co. 

 Schuylkill Canal, Manayunk, Philadelphia Co. 



Wissahickon Creek, Flourtown, Montgomery Co. (P. A. Keppelniann). 

 Little Neshaminy Creek, Grenoble, Bucks Co. 

 Common Creek, Tullytown, Bucks Co. 

 Princess Creek, Kunkletown, Monroe Co. 



