54 UNIVERSITY OF COLORADO STUDIES 



The following species and subspecies herein recorded were not 

 included in the former list: Pisidium abditum huachucanum Pilsbry 

 and Ferriss, Pisidium near roperi Sterki, OreoJtelix haydeni gabbiana 

 Hemphill, Pupilla syngenes dextroversa Pilsbry and Vanatta, Bifidaria 

 agna Pilsbry and Vanatta, Vertigo color adcnsis basidens Pilsbry and 

 Vanatta, Vertigo milium Gould, Vitrea cellaria Muller, Vitrea cellaria 

 margaritacea Schmidt, Vitrea alliaria Miller, Milax gagates Draparnaud 

 and variety plumbea, Galba doddsi Baker, Galba hendersoni Baker, 

 Physa walkeri Crandall. 



Additions to Bibliography 



Baker, Frank C. "Descriptions of new species of Lymnaea." The Nautilus, Vol. XX, 

 pp. 125-127, 1907. (This was published after the appearance of Part I of this 

 catalogue, so was not included in the Bibliography, but was referred to in Part II, 

 under L. leai, and is now inserted to make the bibliography complete.) 



. "A new species of Lymnaea." The Nautilus, Vol. XXII, pp. 140-141, 1909. 



(Describes L. hendersoni.) 



. "The Lymnaeidae of North and Middle America." The Chicago Academy of 



Sciences, Special Publication, No. 3, 191 1. 



Cockereix, T. D. A. "Milax gigates and Vitrea cellaria in Colorado." The Nautilus, 

 Vol. XXI, pp. 131-132, 1908. 



. "Land Mollusca at Tolland, Colorado." The Nautilus, Vol. XXV, pp. 58-59, 



1911. 



Hanna, G. D. "The American species of Sphyradium with an inquiry as to their generic 

 relationships." Proc. U.S. Nat. Mus., Vol. XLI, pp. 371-376, 1911. 



Henderson, Junius. " Zonitoides alliaria in Colorado" [Vitrea alliaria]. The Nautilus, 

 Vol. XX, p. 144, 1907. 



. "Scientific expedition to Northeastern Colorado. 4. List of Mollusca col- 

 lected." Univ. of Colo. Studies, Vol. IV, No. 3, pp. 158-159, 1907. 



. "Mollusca collected in Northwestern Colorado." Univ. of Colo. Studies, 



Vol. VII, No. 2, pp. 125-126, 1910. 



Oreohelix colonies in Colorado." The Nautilus, Vol. XXV, pp. 133-139; Vol. XXVI, 



pp. 9-11, 191 2. 

 Pilsbry, H. A., and Vanatta, E. G. "Description of a new Bifidaria (B. agna)." The 



Nautilus, Vol. XX, pp. 140-142, 1907. 

 Vanatta, E. G. See under Pilsbry. 



PELECYPODA (Lamellibranchiata) 

 Genus ANODONTA (Bruguiere em.) Lamarck 

 Anodonta grandis Say. 



Professor Ellsworth Bethel has shown me some very fine specimens of this species 

 which were said to have been collected "about thirty miles north of Denver." 



