THE MOLLUSCA OF COLORADO 



171 



Pupilla blandi Morse. 



Clear Creek, Cunningham Gulch, Animas Valley and Rio LaPlata, IngersoU 35, 

 391. Twin Lakes, Yarrow 68, 927. Black Lake Creek, Cockerell Mss. Pike's Peak 

 (E. Hall), North Park (E. A. Barber), Estes Park (Rev. E. A. Ashmun), Buzzard Creek, 

 Black Lake Creek, Mesa and Custer Counties (Cockerell), Trinidad (Pilsbry),Vanatta Mss. 



Pupa blandi. Colorado, Binney 6, 188; Dall 34, 367; Pilsbry & Johnson 43, 20; 

 Surface Creek, Cockerell 22, 65. 



Form obtusa Ckll. "Broader in proportion to its length than the type," near Micaw- 

 ber Mine, Cockerell 24, 39; Pilsbry & Johnson 43, 20; Pilsbry & Vanatta 44, 605. 



"The species of Pupa are numerous and puzzling. The common species in Custer 

 Co. is P. blandi Morse, which presents various forms, one of which Mr. C. F. Ancey, to 

 whom specimens were sent, refers to P. bigranata Rossm. Probably they are all refer- 

 able to P. marginata Drap. as varieties." Cockerell 22, 62. 



Collected at Magnolia by Mr. D. M. Andrews; on the Niobrara limestone ridge 

 south of Left Hand Creek north of Boulder by Prof. Cockerell and the writer; at Tolland 

 by Prof. E. Bethel and by the writer at Boulder and Eldora. 



Pupilla sonorana Sterki. 



Estes Park (Rev. E. H. Ashmun), Vanatta Mss. 



Genus BIFID ARIA Sterki i 



Bifidaria armifera Say. Fig. 7. 



Trinidad (Pilsbry), Vanatta Mss. 



We have found it fossil at mouth of Bear Canyon 

 south of Boulder but find no published record for 

 the state. 



Fig. 7. — Bifidaria armifera 



Fig. 8.— Bifidaria 

 pentodon. 



Bifidaria pentodon Say. Fig. 8. 



Pupa montanella Ckll. Western Custer County, Cockerell 22, 63 

 (no description accompanying the latter name, it is a nomen nudum, and 

 is in any event a synonym, Pilsbry & Vanatta 44, 6c8). Prof. Cockerell 

 says he has since compared his figure and notes and finds the shell to be 

 the real pentodon as recently restricted by Pilsbry and Vanatta. 



Bifidaria pilsbryana St. 



Trinidad (Pilsbry), Vanatta Mss. 



Bifidaria hordeacella Pils. 



Trinidad (Pilsbry), Vanatta Mss. 



Bifidaria procera Gld. 



Trinidad (Pilsbry), Vanatta Mss. 



Genus VERTIGO Draparnaud 

 Vertigo ovata Say. Fig. 9. 



Twin Lakes and Saguache, Yarrow 68, 927, 928. Fossil at 

 West Chff, Cockerell 29, 143. Trinidad (Pilsbry), Vanatta Mss. 

 Vertigo ovata antiquorum Ckll. Subfossil at Grape Creek, 

 Fig. 9.-Vertigo ovata. Cockerell Mss. 



' The records of B. pilsbryana, hordeacella and procera have just been received and consequently do not 

 appear in the key included in Part 1 of this paper. 



