322 CIYLICHNA. 



lines ; vertex obliquely truncated, crateriform, imperforate. Aper- 

 ture very narrow, linear ; cokunellar fold connpicuous. Alt. 8, 



diam. scarcely 3 mill. (Gld.). 



Simon's Bay, Cape of Good Hope. 



C. tubii,/om Gld., Proc. Bost. Soe, vii, p. 140 ; Otia, p. 113. 

 Allied to 0. involutii Ad., but the outlines are more rectilinear 



{Gld.). 



C. ATi-ANTiCA E. A. Smith. PI. 27. fig. 97. 



Shell ovate-cylindrical, thin, j)ellucid-white, shining, riniate, nar- 

 rowly perforated at the vertex, transversely very delicately striated, 

 especially above and below. Aperture very narrow above, slightly 

 dilated below ; lii) thin, produced above the vertex ; columellar 

 margin covered with a thin reflexed callus, obsoletely subtruncate 

 below. Alt. 5], diam. 2j mill. {Svi.). 



St. Helena. 



Cylichna atlantica Smith, P. Z. S. 1890, p. 297, pi. 24, f 10. 



This species has more curved outlines than C. cylbulrdcea, has a 

 perforate apex, and an umbilical chink. The thin columellar cal- 

 losity extends up the whorl, and joins the upper extremity of the 

 outer lip (Srn.). 



Species of unknown habitat. 



C. SARsii (Phil.) A. Adams. PI. 59, fig. 6. 



Shell ovately cylindrical, posteriorly truncate, anteriorly pro- 

 duced, apex perforated, white, transversely very finely striated; 

 aperture narrow ; columella anteriorly with a single fold ; outer lip 

 })Osteriorly produced (Ad.). 



Habitat unknown (Mus. Han ley). 



B. {Cylichna) sar^^U Phil., A. Ad., Thes. ii, p. 591, pi. 125, f 135. 

 I cannot find that Philippi ever described this species. 



C LAOTKOCiNCTA E. A. Smith. Unfigured. 



Shell minute, cylindrical, pellucid, encircled by several inter- 

 rupted milky bands ; with longitudinal, very fine, curved striae, 

 and transversely striated below ; vertex umbilicate, surrounded by 

 a rounded margin. Aperture narrow above, sensibly dilated be- 

 low ; columella thickened, obliquely subtruncate. Alt. 2j, diam. 

 11 mill. (*Sm.). 



Habitat unknown. 



C. ladeocincta Sm., Ann. Mag. N. II. (4), ix, p. 352. 



