i ^ IK II ' 



Sal- 



SuhgellllS ( 'VI.K UN \ 



Shell sulicvlindrieal, the apex either concealed or 

 BUrfM6 tmicolored whitish or brownish ; columella with ..w indi-- 

 tiiu-t fold or none. A further division of this suhgi'iius will ventii- 

 ally be made, but in tbe present state of our knowledge of the group, 

 the natural sections of Oylichna cannot be defiled. 



Submenus MNI>TI.\ II. 4 v A. Adams. 



Shell ovate-cylindrical, marbled or banded. Spire imnierM-d in 

 the deep umbilicus. Anatomy unknown. 



Subgenus CYLICHM.I.LA (iubb. 



Shell oblong-oval ; spire concealed, imperforate ; columella with 

 a callous fold, and below it a nodule-like fold. Anatomy unki 



Subgenus CYLICHNA Loven. 

 Species of the North Atlantic, Arctic and Me'Ht'-i 



C. CYLINDRACEA Pennant. PI. 29, figs. 15, 16, 17. 



Shell cylindrical with parallel sides slightly tapering toward each 

 end, squarely truncated above; solid and opaque. Surface >li i L f htly 

 glossy, covered with a brownish-yellow cuticle; sculptured with 

 numerous fine, superficial spiral stria?. Apex apj.earin;: like a 

 slightly concave disc bounded by an angular keel, the whorls not 

 visible. Aperture as long as the shell, narrow and parallel-- 

 above, suddenly expanding at the base. Lip strongly " t' 

 'above, forming a large, deep sinus; straight in the middle, and 

 again retracted and etfuso at base. Columella thickened, with a 

 broad but indistinct fold. Alt. 7', diam. L'- mill. 



Euroj>e<Di .*eu* fi'in NoTVKty '</ / ; " Me- 1 



ranean ; Whyilih, W. Africa; >'/. / ^inith); 



42Qfms.<ni<! Tristunda On/m (Challenger). 



IY.N\\NT, lirit. /(!. iv, p. 117. pi. 7i, f. 85, 



cyKndrac* !. n, Ind. Moll. Sc :m d. p. : 



Ji.ri KI.V-. J'.ri'. ( -nch. iv, p. 41 ~> ; v. pi 9 ^loll. 



