CYCLOSTREMA.— Plate II. 



species 



[Ml 



rit.) 



Cyclostrema Ref.viana. Cyc. testa majmcidd, con- 

 centnce regnlariter rugatd ; anfractibus depressis, 

 costis moniliformihis, cmspicuis cincta ; umhilico 

 medincri, intiis piano ; aperturd suhoUiqud. 



Reeve's Ctclostrema. Shell rather large, concen- 

 trically regularly -wrinkled; whorls depressed, 

 encircled with beaded conspicuoiis ribs ; umbili- 

 cus middle-sized, fiat within; aperture rather 

 oblitjue. 



Hinds. (Delphinula.) Voyage of the Suliihur, p. 52, 

 pi. 16, f. 17. 



Hah. Straits of Malacca. 



Species 14. (Mus. Crosse.) 



CYCLOSTREifA Beani. Ci/c. tcstd deprcssd, sp)ird plan- 

 orhuld ; ultiino anfractu paulo sup)rd medium 

 carinato ; suprd, carinani spiraliter striato ; infra 

 medium planato ; circa umbilicum angulato ; 

 umbilico intiis piano ; aperturd expansd ; labia 

 externa supeitie crenulafo, infra in processum 

 acute angulatum praducto. 



Bean's Cyclostrema. Shell depressed, spire planor- 

 bular ; last whorl keeled a little above the middle ; 

 spirally striated above the keel ; flattened below ; 

 angular round the umbihcus ; umbilicas flat 

 within ; aperture expanded ; outer hp crenulated 



above, produced into an acutely angular process 



below. 

 Fischer. (Adeorbis.) Journ. de Conch. 

 Hah. Guadaloupe. 



Species 15. (Mus. Brit.) 



Cyclostrema tornata. Cyc. testd depressa-suhglohosd ; 

 spird subelevatd, anfractibus lente crescentibus, 

 rotundis, spiraliter sex-castaiis ; aperturd siib- 

 rotundd ; umbilica parva. 



The engine-turned Cyclostrem.a. Shell depressed, sub- 

 globose ; spire slightly elevated, whorls slowly in- 

 creasing, round, spirally six-ribbed ; aperture 

 rather rounded ; umbilicus small. 



Arthur Adams. Sowerby's Thesaurus, Cyclostrema. 

 Species 10, f. 13. 



Ilab. Japan. 



Species 16. (Mus. Brit.) 



Cyclostrema cingulata. Cyc. testd valde deprcssd, 

 carinis acutis prope suturam una, infra, medium 

 duahus cinctd ; aperturd magiid, triauijulatd ; 

 umbilico magna, piano. 



The encircled Cyclostrema. Shell much depressed, 

 encircled with one sharp keel near the suture and 

 two below the middle ; aperture large, trian- 

 gular ; umbihcus large, flat. 



DuNKER. MoUusca of Japan. 



Uab. Japan. 



