20 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Ariolima:^ Hemphilli, Arionta Carpenteri. 



Anderaoni. Mormonum. 



Arion ? Anderaoni. aequoicola, 



Gonoatoma Yateai. Traaki. 



Triodopaia Harfordiana. Dupetithouarai. 



loricata. ruiicincta. 



Aglaja infunaata. Gabbi. 



Hillebrandi. facta. 



Arionta arroaa. Kelletti. 



Nickliniana. Stearnaiana. 



Ayresiana. Euparypha Tryoni. 



redimita. Glyptoatoma Newberryanum. 



interciaa. Pupa corpulenta. 



exarata. Ro-welli. 



ramentoaa. Californica. 



Californienaia. Succinea Sillimani. 



Diabloenaia. Stretchiana. 



Of the above, several species extend beyond the limits of the region. 

 Thus, Vitrina Pfeifferi, Zomtes Whitneyi^ Pupa corpulenta^ Succinea 

 Sillimani, Succinea Stretchiana, and S. rusticana are found also on the 

 ■western slope of the Sierra Nevada in the Central Province. Aglaja 

 infumata and Macroci/clis Voyana are also found outside the bounds of 

 the Region, in the Oregonian Region. 



AVith the fimna of Lower California there seems no connection, though 

 one or two species overlap at the dividing line, as Arionta Stearnsiana. 

 Another species, A. Carjyenteri, is included in the above list, having 

 been quoted from San Diego and Tulare Valley, California. It may, 

 however, belong rather to the Lower California fauna,* having been 



* Tlie peninsula of Lower California forms a distinct molluscous province of itself, ex- 

 tending nearly to San Diego. The following species are peculiar to it : — 



Coelocentrum irregulare, Gahh. Bulimulua pallidior, Sowerhy. 



Arionta Stearnaiana, Nexcc excelaua, Gould. 



Rowelli, Xeivc. {Lohri, Gabb.) inacendena, \V. G. Binn. 



Euparypha areolata, Sowb. (Veitckii. aufflatua, Gonkl. 



Tryon). pilula, W. G. Binn. 



Pandorce, Forbes. proteua, Brod. 



levia, Pfr. Xantuai, W. G. Binn. 



Berendtia Taylori, P/r. artemiaia, W. G. Binn. 



Bulimua apirifer, Gulb. Onchidium Carpenteri, W. G. Binn. 



Gabbi, Crosse. 

 Veronicella olivacea, Stearns, a Nicaraguan species, is also found in Lower California. 

 Of the above list one only has been found near San Diego, A. Stearnsiana. Another, A. 

 Roioelli, has been referred to Arizona, but with doubtful accuracy. E. Pandorce and are- 

 olata have also erroneously been referred to California. A. Remondi {Carpenteri) is 

 omitted from the list, as it also occurs in the California Region. It is the only species 



