MUSEUM OF COMPARATIVE ZOOLOGY. 45 
Arionta Townsendiana, Lea. 
As restricted (see p. 39), this species seems confined to the Oregon region. 
Arionta exarata, Prr. 
Arionta Californiensis, La. 
As proposed in Man. Amer. Land Shells, I unite under this specific name the 
various forms described as — 
Helix vincta, VAu. (See Vol. IV. for a facsimile of figure.) 
Nickliniana, Lea. (See Vol. III. Pl. VI. Fig. a.) 
arboretorum, VAL. (See Vol. IV. Pl. LXXXVI. Fig. 13.) 
nemoraviga, VAL. (See same, Pl. LX XIX. Fig. 11.) 
anachoreta, W. G. B. (See same, Pl. LXXVI. Fig. 5.) 
ramentosa, GLD. (See Vol. V.) 
Parkeri, TRYon. 
reticulata, Prr. (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 umbili- 
cated form (Fig. 168), a larger imperforate form (Fig. 111), and a figure of a 
shell received under the name of Diabloensis from Dr. Cooper (Fig. 113). 
Arionta intercisa, W. G. Brxy. 
I am now convinced that redimita is a variety of this species. 
Arionta Ayersiana, Newc. Arionta Traski, Newc. 
tudiculata, Brinn. Carpenteri, Nrewc. 
Mormonum, Prr. Dupetithouarsi, Desu. 
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, Newe. Arionta Kelletti, Forsrzs. 
Gabbi, Newc. Stearnsiana, Gass. 
Euparypha Tryoni, Newc. 
The allied species L. levis, Pfr., recently collected by Mr. Orcutt in Lower 
California, has a genital system (PI. III. Fig. 2) very near that of E. Tryont 
(see Vol. V. Pl. XIV. Fig. c). I did not detect the organ 2 in levis. The 
