CYU< UNA. 



( '. ITMI i.i i M \ 1'. ,\. Smith. I'lifii/ni-'-'l. 



Shell very minute, shortly eylindneal, .somewhat r.,nt r act. d in 

 the middle, c|iuulrate above, white, with curved longitudinal . 

 vertex umhilicate, witli rounded margin ; apertmv nan -.lu.-d ;i i > 

 very niiieh dilated at ha>e; rolumella spirally twi.-ted. Alt. 14, 

 diam. ,' mill. (5m.). 



Fenian Gulf, i('<>\. I'elljr). 



( '. /mnu/i'tttma SM., Ann. Ma-. N. If., (4), ix, |>. 



This species was dredged by Col. IVdly in jrreat numbers at a 

 depth of 14 fms. It is remarkable for its minuteness, the longitu- 

 dinal curved ridges, and the very dilated aperture towards the 

 base. (Sm.). 



C. CONsANnriNEA E. A. Smith. fnjn/nred. 



Shell very minute, elongate-cylindrical, white, longitudinally 

 curvedly striate ; vertex umbilicated, surrounded by an acute 

 carina ; aperture narrow above, moderately dilated below ; lip a 

 little contracted in the middle ; columella spirally folded. Length 

 H, diam. 3 mill. (m.). 



Persian Gulf, 14 fms., (Col. Pelly). 



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



This species differs from C. pumilissima in being much more elon- 

 gate, and in having an acute keel around the vertical umbilicus ; 

 the basal part of the aperture is also less dilated. (Sm.). 



C. LAUIATA Watson. PI. 30, figs. 3, 4. 



Shell small, strong, oval, obliquely truncate above, where the 

 apex is impressed, bluntly pointed in front, obscurely angulated 

 above the middle, umbilicate, finely and closely striate, with a 

 thickened lip posteriorly produced. Sculpture: Longitudinals 

 there are fine, straight, hair-like unequal lines of growth. Spirals 

 there are fine spiral lines, which at the top and bottom of the 

 shell are a little strong and remote, but in all the center part are 

 very faint and crowded, and above the middle where a very blunt 

 angulation occurs, they are nearly invisible. Color translucent 

 white, with a tinge of brown, which on the outer base is ochreous. 

 Mouth long, curved, narrow, a little enlarged in front ; outer lip 

 rises perpendicularly from the outer edge of the impressed apt 

 produced posteriorly, where it bends in toward the apex, and is 

 patulous and almost emargiuate ; its direction and edge line are 



