136 CYMBA. 



CYLICHNA. Loven. Cylikdrelia, SwaiDson. Yolvabia. 

 Brown. A siib-genus of Bullidse, cons-isting of animals with 

 shells, thus described in Adams's Monograph, No. 11, Sowerhy's 

 Thesaurus : " Cylindrical ; spire none ; apex umbilicated ; colu- 

 mella callous, with a single plait." 



CYLINDEE. Montf. ISIQ. Conus textile, Auct. (fig. 461) 

 and other species haying a cylindrical form, 



CYLINDEA. Schumacher, 1817. Voluta crenulata, Lamarek,, 

 and other species like Conohelix, but cancellated, 



CYLINDilELI.A. Sw. Cylichna. 



CYLINDEICAL. (KvXivcpoe, a cylinder.) This like other ma- 

 thematical terms is used with great latitude by Conchologists, 

 and applied to any shell the sides of which are nearly parallel, 

 with the extremities, either rounded, flat, or conical. Ex. Oliva, 

 fig. 457. 



CYLLENE. Gray, 1839. Fam. Purpurifera, Jjam.—Descr. Oval, 

 thick, with a short acute spire ; an oval aperture terminating 

 anteriorly in a slight emargination, posteriorly in a short canal ; 

 a fold at the lower end of the body w^borl ; outer lip thick, stri- 

 ated within; angle of the whorls tuberculated.— 05*. This 

 genus of small marine shells resembles Voluta in general cha- 

 racter, but differs in haATing a smooth columella without folds. 

 E.ecent, Pacific Ocean ; Eosil, London clay. PI. xix. fig. 425. 



CYMBA. Broderip. (Cymba, a boat or skiff.) Fam. Columel- 

 laria, Lam. — Descr. Smooth, ventricose, with a very short, mam- 

 millated, rude spire; and a very large, wide aperture, terminated 

 anteriorly in a deep emargination ; posteriorly in a flat ledge, 

 which separates the outer lip from the body whorl ; columella 

 with three or four oblique, laminar, projecting folds, terminating 

 in a point ; outer lip thin, with its edge sharp ; epidermis 

 smooth, brown, covered partly or entirely by the glassy enamel, 

 which, commencing with the outer lip, spreads over the body of 

 the shell.^06*. These very elegant shells, found in Africa, are 

 distinguished from the true Volutes by the shapeless, mammil- 

 lated ap$x of the short spire, by the large size of the aperture, 

 and by the horizontal ledge -which separates the outer lip fx'om 



