20 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Ariolimax HemphillL Arionta Carpenteri. 



Andersoni. Mormonum. 



Arion ? Andersoni. sequoicola. 



Qonostoma Yatesi. Traski. 



Triodopsis Harfordiana. Dupetithouarsi. 



loricata. ruficincta. 



Aglaja infumata. Gabbi. 



Hillebrandi. facta. 



Arionta arrosa. Kelletti. 



Nickliniana. Stearnsiana. 



Ayresiana. Euparypha Tryoni. 



redimita. Glyptostoma Newberryanxxm. 



intercisa. Pupa corpulenta. 



exarata. Rowelli. 



ramentosa. Californica. 



Californiensis. Succinea Sillimani. 



Diabloensis. Stretchiana. 



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

 Thus, Yitrina Pfeifferi, Zonites 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 Macrocyclis Voyana are also found outside the bounds of 

 the Region, in the Oregonian Region. 



With the fauna of Lower California there seems no connection, thoxigh 

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

 Another species, A. Carpenteri, 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 



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

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



Ccelocentrum irregulare, Gabb. Bulimulus pallidior, Sowerby. 



Arionta Stearnsiana, Newc. excelsus, Gould. 



Rowelli, Newc. (Lohri, Gabb.) inscendens, W. G. Binn. 



Euparypha areolata, Sowb. (Veitchii. sufflatus, Gould. 



Tryon). pilula, W. G. Binn. 



Pandoras, Forbes. proteus, Brod. 



levis, Pfr. Xantusi, W. G. Binn. 



Berendtia Taylori, Pfr. artemisia, W. G. Binn. 



Bulimus spirifer, Gabb. 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. 

 Rowelli, has been referred to Arizona, but with doubtful accuracy. E. Pandora and are- 

 olata have also erroneously been referred to California. A. Jtemondi (Carpenteri) is 

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



