CYLICIfNA. 323 



This species may be at once recognized by the lacteous bands 

 upon a hyaline ground, and by the peculiar subtruncation of the 

 columella, which almost forms a short channel with the outer lip 

 (Sm.). 



Subgenus Mnestia H. & A. Adams, 1854. 



Mnestia Ads., Genera Recent Mollusca ii, p. 10 (for C. bizona 

 and C marmorata). 



This group is at present restricted to species with variegated col- 

 oration. 



C. MAKMOKATA A. Adams. PI. 27, tig. 86. 



Shell ovate, contracted above, produced and rather acuminate 

 below, smooth, shining, variegated with pale red-brown and white, 

 the spots in some specimens disposed in distinct bands, transversely 

 very minutely striated ; stria; most distinct above and below ; spire 

 conspicuous, in the deep umbilicus of the apex ; aperture narrow, 

 acuminately produced above and below ; columella straight, rather 

 callus, umbilicus distinct (Ad.). 



Capul, Philippines. 



B. (Cylichna) viarmorata Ad., Thes. p. 59-1, pi. 125, f. 145. 



C. J5IZONA A. Adams. PI. 27, fig. 84. 



Shell ovately cylindrical, fulvous, encircled with two pale red 

 brown bands, longitudinally obsoletely plicated, engraved with dis- 

 tinct transverse finely undulated striio ; spire immersed in the deep 

 umbilicus of the apex ; aperture produced above, linear, dilated in- 

 feriorly ; columella slightly plicated, rather reflected, umbilicus 

 covered ; outer lip inflexed superiorly (^Ad.). 



Alt. 5, diam. 2*2 mill. 



China Sea (Cuming) ; Singapore (Dr. S. Archer) ; Levuka, Fiji 

 (Challenger) ; Torres Strait (Brazier). 



Bulla (Cylichna) bizona A. Ad., Thes. ii, p. 595, pi. 125, f 148. 

 — Oylichna {Mnestia) bizona H. & A, Ad., Genera, ii, p. 10. — 

 Watson, Challenger Gastrop. p. 671. — Mnestia bizona Braz., P. L. 

 S. N.S. W. ii, p. 81. 



In the specimens from Singapore before me the bands are a little 

 more widely spaced than in Sowerby's figure. 



