310 CYLICHNA. 



B. (Cylichna) concinna AD., Thes. Conch., p. 593, pi. 125, f. 142. 

 C. concinna E. A. SMITH, Ann. Mag. N. H., (4), xvi, p. 113. 



C. BREVISSIMA A. Adams. PL 40, fig. 92. 



Shell ovately cylindrical, a little contracted in the middle, trans- 

 versely spirally striated ; apex umbilicated, umbilicus partly cov- 

 ered by the columellar callus ; aperture narrow, linear, contracted 

 in the middle, above produced, below dilated ; columella reflexed, 

 rather callous. (Ad.). 



China Sea, (Cuming) ; Sea of Japan (Ad.). 



B. (Cylichna) brevissima AD., Thes., p. 593, pi. 125, f. 144. 

 Haminea brevissima A. Ad., Ann. Mag., (3), ix, p. 155. 



C. PYRAMIDATA A. Adams. PI. 27, fig. 88. 



Shell subcylindrical, acuminated above, hardly dilated at the 

 base, white, shining, longitudinally grooved, faintly striated trans- 

 versely above and below ; spire hardly obvious, apex deeply umbili- 

 cated ; aperture narrowly linear, produced above, dilated below ; 

 columella reflected, rather callous, umbilicus covered. (Ad.). 



China Sea (Cuming). 



B. (Cylichna) pyramidata AD., Thes., ii, p. 595, pi. 25, f. 149. 



Jeffreys says that this is the same as Cylichna (or Retusa) striatu- 

 la Forbes. 



C. INVOLUTA A. Adams. PL 27, fig. 83. 



Shell cylindrical, posteriorly truncated, white, solid, transversely 

 entirely striated; aperture narrow, linear; outer lip straight, its 

 angle produced, rounded ; inner lip anteriorly tortuous, with a sin- 

 gle fold. (Ad.). 



China Sea (Cuming). 



B. (Cylichna) involuta AD., Thes., ii, p. 595, pi. 125, f. 151. 



This is not the Cylichna involuta Nevill, which is a species of 

 Tornatina. 



C. BIPLTCATA A. Adams. PL 27, fig. 85. 



Shell cylindrical, slender, posteriorly somewhat rounded, engraved 

 with rather distant spiral striae ; apex deeply umbilicated ; aper- 

 ture narrow, linear, produced above, dilated below ; columella cal- 

 lous, with two plaits ; covered with a reddish-brown epidermis. 



China Sea (Cuming) ; Suez (Cooke). 



