H ELIX. 73 



well-rouuded, descending in front ; peristome white a little expanded 

 at the top, becoming reflected on the base. Diam. 29 mill. 



Oregon, Mountains of Idaho and Montana. 



H. pedestris and H. rnida of Gould are syiNuiyms. H. ptycho- 

 phora, Brown, was formerly considered a small variety of this species; 

 it is now referred to Mesodon (Vol. Ill, p. 154). 



H. EXARATA, Pfr. PL 16, fig. 18. 



Moderately umbilicated, rather solid, rugulosely malleated, yel- 

 lowish brown, with a narrow superior chestnut band ; whorls 7, con- 

 vex, the last scarcely descending in front ; peristome slightly white- 

 lipped, expanded. Diam. 30 mill. 



Coast region, of California, from S. Francisco to Sta. Cruz. 



H. NICKLINIANA, Lea. PL 16, figs. 19, 20. 



Minutely umbilicated, rather thin, with light growth-lines, faintly 

 indented and granulated in quincunx order, pale horn colored or 

 ash-yellow, with a superior chestnut narrow band, paler on its mar- 

 gins ; whorls 6, moderately convex, the last ventricose, the periphery 

 sometimes obsoletely angulated, base tumid ; peristome white, slightly 

 reflected above, more so below. Diam. 28 mill. 



California to Santa Cruz to Mendocino Co. 



H. nemorivaga and H. arboretorum, Val. are synonyms. H. ana- 

 choreta, Binuey (fig. 20) was founded on a less globose form of this 

 species, without revolving band. In his latest monograph Mr, W. G. 

 Biuney considers H. Nicldiniana a variety of H. Calif 'or niensis, Lea, 

 a decision with which I by no means agree. I do not think H. Cal- 

 iforniensis belongs to this group at all. 



H. RAMENTOSA, Gould. PL 16, fig. 21. 



Narrowly umbilicated, rather solid, obliquely striated and gran- 

 ulated, yellowish brown with a superior narrow chestnut band ; 

 whorls 5 2, somewhat convex, the last broad, rounded or very obso- 

 letely angulated, not declining in front; peristome white, thickened, 

 somewhat expanded, reflected at the base. Diam. 20 to 30 mill. 



Napa Co. to Sta. Clara Co., California. 



The synonyms are H. reticulata, Pfr. and H. Bridgesii, Newcomb. 

 The latter name being preoccupied, I formerly suggested instead of 

 it H. Parkeri. Mr. Biuney considers H. ramentosa a variety of H. 

 Calif or niensis, Lea. 



