6 TORTAXIS. 



of Tortaxis, was later shown to be an Elma, family Strep- 

 taxidse (Nachrbl. D. Mai. Ges., 1890, p. 148). 



The axis is but slightly sinuated in the whorls of the spire, 

 not strongly so as in Bacillum. 



1. T. SUPERBUS Mlldff. 



Shell rimate, rather ventricosely turrited, rather solid, ob- 

 liquely curved striatulate and decussated with spiral lines, 

 greenish-yellow; apex obtuse. Whorls 9, a little convex, 

 noticeably increasing, the last inflated, not descending. 

 Aperture oblique, truncate-oval; peristome a little 'expanded, 

 very much thickened, the columellar margin dilated, not trun- 

 cated or twisted below. Length 40, diam. 11.5, aperture lOx 

 7.5 mm. (Mlldff.). 



China: Heng-shan-hsien, prov. Hunan (Fuchs). 



Stenogyra (? Opeas) superba MLLDFF., Nachrbl. d. m. 

 Ges., 1888, p. 44. 



By the umbilical crevice and shape of the columella this 

 appears to belong to the section Opeas, but it differs widely 

 from the typical species of that group by the great size and 

 thick peristome (Mlldff.). 



2. T. PALUS (Heude). PI. 12, figs. 2, 3. 



Shell of moderate size, long-turriculate ; spire strongly 

 attenuate, long-conic. Whorls 14, flattened, the upper mar- 

 gin crenulate, joined by a scalar suture, the last acute at the 

 base. Aperture oval. Length 28, diam. 6 mm. (Hde.). 



China: Kuang-si. 



Stenogyra palus HDE., Notes sur les Moll. terr. de la Vallee 

 du fleuve Bleu, p. 151, pi. 38, f. 25. 



The generic position of this form is uncertain. 



3. T. CHINENSIS (Pfeiffer). 



Shell oblong-turrited, thin, under a lens seen to have hair- 

 like striae, glossy, pellucid, waxen-hyaline. Spire lengthened, 

 the apex rather obtuse, whorls 6, moderately convex, the last 

 one-third the total length, somewhat tapering basally. Aper- 

 ture subvertical, oblong. Columella callous, somewhat 



