1886. J PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 401 



The figure giveu below was drawn from a specimen received from Mr. 

 Binney, which agrees closely with Newcomb's diagnosis, and with speci- 

 mens in the Smithsonian collection received from Newcomb himself. 



Selenites cfelata Ma,zyck. Selenites DuranWNewcovab. 



Selenites cwlata, described above, is about the size of, but diifers ma- 

 terially from, this species in its general outline, being more nearly cir- 

 cular and of greater height, 8. Buranti being, as emphasized by Tryon, 

 "wo? at all elevated,, perfectly plane above," with the aperture trans- 

 versely sub-oval, as ISTewcomb says, " rounded, lunate." But aV. ca'lata 

 is somewhat convex below, has the spire sufficiently elevated to dis- 

 tinctly show each whorl when viewed from the side, and its aperture is 

 almost circular. The most marked diiierence is, however, in the sculp- 

 ture — S. Buranti being minutely striated while *8'. cantata is covered, ex- 

 cept at the apex, with heavy, coarse, rough ribs, presenting, in this re- 

 spect, somewhat the appearance of some forms of Patula alternata, Say, 

 by which feature it differs utterly from any of its congeners. It is a 

 much thicker shell than S. Buranti. 



Note by W. H. Dall. — Helix cwJata of Studer, a European species 

 related to E. (Trichia) hispida, belongs to a totally different group, and 

 cannot affect the validity of Mr. Mazyck's specific name. 



