MUSEUM OF COMPARATIVE ZOOLOGY. 45 



Arionta Townsendiana, Lea. 



As restricted (see p. 39), this species seems confined to the Oregon region. 



Arionta exarata, Pfb. 



Arionta Californiensis, Lea. 



As proposed in Man. Amer. Land Shells, 1 unite under this specific name the 

 various forms described as — 



Helix vinda, Val. (See Vol. IV. for a facsimile of figure.) 

 Nickliniana, Lea. (See Vol. III. PI. VI. Fig. a.) 

 arhoretorum, Val. (See Vol. IV. PI. LXXXVI. Fig. 13.) 

 nemoraviga, Val. (See saine, PI. LXXIX. Fig. 11.) 

 anachoreta, W. G. B. (See same, PI. LXXVI. Fig. 5.) 

 ravientosa, Gld. (See Vol. V.) 

 Parkeri, Tryon. 

 reticulata, Pfu. (See Vol. V.) 

 Bridgesi, Newc. (See Vol. V.) 



I have figured, in Man. Amer. Land Shells, Fig. 109, a large umbilicated 

 form, probably very^ near to Newcomb's type of H. Bridgesi, a small umlaili- 

 cated form (Fig. 168), a larger imperforate form (Fig. Ill), and a figure of a 

 ^hell received under the name of Diabloensis from Dr. Cooper (Fig. 113). 



Arionta intercisa, W. G. Binn. 



I am now convinced that redimita is a variety of this species. 



Arionta Ayersiana, Newc. Arionta Traski, Newc. 



tudiculata, Binn. Carpenteri, Newc. 



Mormonum, Per. Dupetithouarsi, Desh. 



Arionta sequoicola, J- G. C. 



An enlarged view of the sculpturing of this species is given in Man. Amer. 

 Land Shells (Fig. 127) 



Arionta ruficincta, Newc. Arionta Kelletti, Forbes. 



Gabbi, Newc. Stearnsiana, Gabb. 



Euparypha Tryoni, Newc. 



The allied species E. Levis, Pfr., recently collected by Mr. Orcutt in Lower 

 California, has a genital system (PI. IIL Fig. 2) very near that of E. Tryoni 

 (see Vol. V. PI. XIV. Fig. c). I did not detect the organ 2 in levis. The 



