HELIX. 115 



partially involving the others ; lip reddish brown, reflected, aper- 

 ture narrowly lunar. Diam. 6'5 mill. 



Northern Italy. 

 It is Chloritis drepanostoma, Beck. 



H. YATESI, Cooper. PL 23, figs. 66-68. 



Widely, deeply umbilicated, translucent, glabrous, corneous, with 

 minute incremental lines; whorls 6, the spire depressed, the last 

 whorl conically subcompressed above, rounded below ; aperture 

 narrowly vertical, the lip obtusely thickened. Diam. 8 mill. 



Cave City, California. 



Subsection TRIGONOSTOMA, Fitz., 1833. 

 European Species. 



H. ANGYGYRA, Ziegler. PL 23, figs. 69-71. 



Umbilicated, concave above, plane below, light corneous, very min- 

 utely punctulate and striulate ; whorls 6, convex, the last compressed, 

 gibbous in front and suddenly deflected ; peristome white-lipped. 



Diam. 11 mill. 



Italy, Switzerland, Tyrol. 



H. Stentzii, Partsch, is a synonym. 



H. OBVOLUTA, Miiller. PL 23, figs. 72-74. 



Umbilicated, flattened above and below, opaque, brownish, 

 velvety; whorls 6, narrow, slightly convex, the spire concave, 

 penultimate whorl a little prominent, the last compressed, scarcely 

 descending in front, scrobiculate ; aperture obtusely triangular, the 

 right and basal margins each with an obtuse tooth, lip reflected. 



Diam. 13 mill. 



Northern and Middle Europe. 



The synonyms are H. trigonophora, Lam., H. bilabiata, Olivi, H. 

 holosericea, Gmel. 



Var. BOSNIACA, Bottger. 



Aperture larger, wider, scarcely trisinuate, lip well reflected, not 

 scrobiculate externally. Diam. 12*5 mill. 



Bosnia. 



Var. PALLIDA, Moquin-Tandon. 

 Shell light colored. 



France. 

 Vars. MAJOR and MINOR, Locard. France. 



