NO. nil. PROCEEDINGS OF THE NATIONAL MUSEUM. 367 



Family PUPIDJ3. 



\ HoJospira (Haplostcmma) mearnsii, Dall. New Mexico. 

 Ilolotipira {Eadistemma) arizonensis, Stearus. Arizona. 

 *: Jlolospira (Distomospira) hilamellafa, Dall. New Mexico. 

 \ Mctastoma coahuUeusis, liinney. Coalmila, Mexico. 

 i Mctastoina semismlpla, Stearus. ChihuaUiia, Mexico. 

 Mclastoma pfeifferl, Meiike. Soiiora, Mexico. 

 Mctastoma ranondil, Gabb. Souora, Mexico. 

 i Mctastoma crossei, Dall. New Mexico. 



* Fupafallax, Say. Arizona, New Mexico, and northward (P. arisoncnais, Gabb). 



* Pupa muscorum, Linne. Arizona (Palmer). 



^ Pupa hlandii, Morse. Colorado; New Mexico (Ashmun). 



* Pupa syngems, Pilsbry. New Mexico; Arizona to Montana. 



Pupa gahh'u, Dall. New Mexico, Arizona (= P. arizonensis, W. G. Binney, non Gabb). 

 Pupa hordacea, Gabb. Fort Grant, Arizona, to Texas. 



* Pupa procera, Gould. New Mexico to Texas; Minnesota to Rhode Island. 



* Pupa armifera, Say. New Mexico (Ashumn). 

 PujJa hordeacella, Pilsbry. Arizona to Florida. 



* Pujya holziiKjeri, Sterki. New Mexico to Manitoba. 

 Pupa pilshryana, i^ievVi. New Mexico; Arizona. 



^ Pupa pentodon, Say. Nevada; Texas. 



'' SphijradUnn edeididum, Dra^iarnaud. Colorado; Europe. 



Sphijradlum edentulum var. allicoJa, Ingersoll. Colorado. 



* Fertigo cor2)ulenia, MoTse. Nevada; Colorado. 



* Vertigo decora, Gould. Colorado to Alaska (-{-P. ingersolUi, Ancey, + P. colorado- 



ensis, Cockerell). 

 Vertigo decora var. concinnula, Cockerell. Colorado. 



* Vertigo hinneyana, Sterki. New Mexico to Manitoba. 



* Vertigo orata, Say. New Mexico ; Arizona to Montana. 



* Vertigo ventricosa, Morse, var. Arizona. 



* Vertigo tridentata, Wolf. Arizona to Montana, etc. 



* Vertigo milium, Gould. New Mexico (fossil). 



Family SUCCINEID^. 



* Succiuea liueata, Binney. Souora to Fort Union, Nebraska. 



* Succinearusticana, Gould. Nevada. 



* Succinea uuttalliana, Lea. Salt Lake City, Utah. 



* Succinea siUimani, Bland. Nevada. 



* Succinea strvtchiana, Bland. Nevada. 

 Succinea hiteola, Gould. New Mexico; Texas. 



The reader will note what a very large number of species of this list 

 are small and extend from a more congenial habitat in more northern 

 regions along the mountain ranges into this hot and dry region. Doubt- 

 less there are many species to be discovered yet by those who are ready 

 to brave rattlesnakes by turning over fragments of volcanic rocks on 

 the sun-scorched mountains near the boundary ; and especially by those 

 who may be fortunate enough to be there during the infrequent rains, 

 when these animals for a time lose their timidity and venture abroad. 

 Especially among the Holosinras may new forms be looked for, as they 

 are remarkably similar to one another externally and are usually found 

 in large numbers where they occur at all. Kot until the fauna of 



