CYLICHNA. 311 



a hiplimta Ad., Thes., p. 598, pi. 125, f. 143.— Cooke, Ann. 

 Mag. N. H., (5), xvii, p. 128. 



C. MONGii Audouin. PI. 27, fig. 96. 



Shell quite small, delicate, ovate-cylindric, slightly more con- 

 tracted below than above, white, smooth, not striate nor sulcate, a 

 little shining ; apex concave, not perforated ; aperture narrow, a 

 little larger below than above ; right margin regularly arcuate, sim- 

 ple, rising above the vertex at the upper part ; visible portion of the 

 columella quite short and not truncated. Alt. 2, diam. 1 mill. (Js- 

 sel). 



Red Sea. 



Savigxy, Desc. de I'Egypte, pi. v, f 7. — Bulla mongii Aud., 

 Expl. des Pi. de Savigny, etc., p. 178, 1827. — Cylichna mongii 

 IssEL, Mai. Mar Rosso, p. 170. 



C. BACILLUS Ehrenberg. TJnfigured. 



Shell cylindrical thin, transversely striated throughout, white ; 

 lip adnate above, not plicate, the other end rounded. One emptv 

 specimen seen, which is in the Berlin INIuseum. Length 41, width 

 2 lines. Aperture exten is beyond the body at both ends ; lip not 

 inflexed ; spire not umbilicate. (Ehrenb.). 



Bed Sea. 



Bulla bacillus Ehrenb., Symb. Phys., Bulla, sp*. 6. 



C PULViscuLUS Ehrenberg. PI. 27, fig. 95. 



Shell semilinear, oblong, cylindrical, thin, transversely striated at 

 both ends, dull whitish ; lip adnate above, not plicate, rounded at 

 the other extremity. Alt. t, diam. i lines. (Ehrenb.). 



Arabian shore of the Red Sea; Suez. 



Bulla pulvisculus Ehrenb., Symb. Phys., Anim. Evert., Bulla, 

 no. 8. — Cylichna 2yulvisc%dtis Issel, Mai. Mar Rosso, p. 169. — 

 Cooke, Ann. Mag. N. H., (5), xvii, p. 128. — Savigny, Descr. de 

 I'Egypte, t. V, f. 6. — Bulla desgenettii Audouin, Expl. PI. Savigny, 

 p. 178, (1827). — Bulla ( Cylichna) pulvisulcus A. Ad., Thes. ii, p. 

 602. 



C. mica Ehrenberg. PL 27, fig. 94. 



Shell semilinear, cylindrical, thin, longitudinally striated through- 

 out, not transversely sculptured, white, the lip adnate above, not 

 plicate, rounded at the other extremity; spire flat. Alt. ri, diam. 

 i of a line. (Ehroib.) 



Red Sea ; Suez. 



