HELIX. 49 



the last ventricose; peristome simple, acute, columellar margin 

 arcuate, dilated, a little reflected. Diam. 22 mill. 



TaJcow, Formosa. 

 H. RAVIDULA, Heude. PI. 10, fig. 17. 



Umbilicus nearly covered, shell thin, fragile, obsoletely striate- 

 cancellate, amber colored, suture impressed; whorls 53, convex, the 

 last inflated, slightly descending; peristome simple, acute, columellar 

 margin dilated and reflected over the umbilicus. Diam. 19 mill. 



Tatsien, China, near the frontier of Thibet. 



The shell differs but little from H. ravida, but the animal, 

 according to Heude is entirely different, bluish with a white stripe 

 on the middle of the neck. 



H. KEDFIELDI, Pfr. PI. 10, figs. 18, 19, 21. 



Narrowly umbilicated, thin, irregularly, flexuously striate, and 

 very obsoletely decussated, diaphanous, shining, fulvous corneous; 

 whorls 5-}, convex, the last inflated, not descending in front; peris- 

 tome simple, acute, margins remote, columella dilated halt-covering 

 the umbilicus. Diam. 17 mill. 



Shanghai, China. 



H. Frilleyi, Crosse and Debeaux (fig, 21), and H. Huberiana, 

 Heude (fig. 19) are synonyms. H. Burtinii, Desh. is also possibly 

 identical; although I have treated it as distinct. 



H. MILIACEA, Martens PL 10, figs. 23, 24. 



Subcovered perforate, very slightly striulate, a little shining, 

 whitish ?, suture well impressed ; whorls 6, the last inflated, not 

 descending in front; peristome simple, acute, columellar margin 

 slightly thickened and reflected. Diam. 6 mill. 



Ins. Amboina. 



It is H. m ilium, Martens, preoccupied by Morse. 



H. SARELII, Martens. PL 10, figs. 25-27. 



With nearly covered umbilicus, striulate, corneous; whorls scarcely 

 4, rapidly enlarging, the last nearly equally convex above and 

 below, deflected in front ; peristome acute, a little thickened within, 

 columellar margin rather widely deflected. Diam. 11*5 mill. 



Prov. Szetsehuen, China. 



H. Nora, H. Adams, is a synonym. 



