322 CYLICHNA. 



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

 ture very narrow, linear ; coluraellar fold conspicuous. Alt. 8, 

 diam. scarcely 3 mill. (Old.}. 



Simon's Bay, Cape of Good Hope. 



C. tubulosa GLD., Proc. Bost. Soc. vii, p. 140 ; Otia, p. 113. 



Allied to C. involuta Ad., but the outlines are more rectilinear 

 (Old.). 

 C. ATLANTICA E. A. Smith. PI. 27. fig. 97. 



Shell ovate-cylindrical, thin, pellucid-white, shining, rimate, nar- 

 rowly perforated at the vertex, transversely very delicately striated, 

 especially above and below. Aperture very narrow above, slightly 

 dilated below ; lip thin, produced above the vertex ; columellar 

 margin covered with a thin reflexed callus, obsoletely subtruncate 

 below. Alt. 5i, diam. 2i mill. (&.) 



St. Helena. 



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



This species has more curved outlines than C. eylindracea, 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 ($m.). 



Spedes 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 

 posteriorly produced (Ad.). 



Habitat unknown (Mus. Hanley). 



B. (Cylichna) sarsii Phil., A. AD., Thes. ii, p. 591, pi. 125, f. 135. 

 I cannot find that Philippi ever described this species. 



C. LACTEOCINCTA 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. 2, diam. 



II mill. (Swi.). 



Habitat unknown. 



C. laeteocincta SM., Ann. Mag. N. H. (4), ix, p. 352. 



