76 



POLYGYRA. 



did not include either of the forms Tryon uses the name for ! Aplo- 

 don, Raf., has also been used in this connection ; it is positively uni- 

 dentifiable. 



P. tridentata Say, iii, 143. 



lunula Raf. 



v. juxtidens Pils. 



v. edentilabris Pils. 

 P. fraudulenta Pils. 



fallax auct., not Say, iii, 143. 

 P. fallax Say. 



introferens Bid. iii, 145. 



# 



P. rugeli Shuttlw., iii, 147. 

 P. inflecta Say, iii, 146. 



P. mullani Bid., iii, 145. 



v. hemphilli W. G. B., iii, 146. 



binominata Tryon, iii, 146. 



olneyce Pils. 

 v. blandi Hemph. 

 v. harfordiana W. G. B., iii, 



eommutanda Anc. [146. 



salmonensis Tryon, iii, 146. 

 v. oregonensis Hemph. 

 P. devia Gld., iii, 154. 

 baskervillei Pfr. 



Species. 



v. obsoleta Pils. 

 P. hopetonensis Shutt. iii, 144. 



ephabus Say, ms. 

 P. vannostrandi Bid., iii, 145. 

 P. vultuosa Gld., iii, 144. 



v. henriettse Maz., iii, 144. 

 copei Weth., iii, 144. 



v. cragini Call, iii, 144. 



P. edentata Samp., viii, 154. 



edentula W. G. B. 

 # * 

 P. columbiana Lea, iii, 154. 



v. labiosa Gld. 



v. armigera Anc., viii, 155. 

 P. roperi Pils., viii, 154. 

 P. loricata Gld., iii, 145. 



lecontii Lea. 

 P. levettei Bid., iii, 143. 



thomsoniana Anc. 



orobcena Anc. 



P. profunda Say, iii, 155. 



richardi Fe"r. 



/ bulbina Dh. 

 P. sayii Binn., iii, 155. 



diodonta Say, not Miihlf. 



v. chilhoweensis Lewis, iii, 

 [155. 

 # 

 P. albolabris Say, iii, 150. 



rufa DeK. 



v. rnaritima Pils. 



P. kiowaensis Simp., viii, 155. 



v. arkansaensis Pils., viii, 156. 

 P. townsendiana Lea, iv, 72. 



pedestris and ruida, Gld. 



v. ptychophora A. D. Br., iii, 

 [154. 



f. castanea Hemph. 

 * * 



v. traversensis Leach. 



v. major Binn., iii, 150. 





