CYCLOSTREMA.— Plate III. 



Specieii 21. (Fig. a, b, Mus. Brit.) 



Cyclo.stre.ma cornuella. Cyc. testa minutd, globosd ; 

 spird elevatd ; anfractibus paucis, rotundis ; ultimo 

 anffactu magna ; wnbilico lato ; aperturd 7-otundd. 



The little horn Cyclostresia. Shell minute, globose ; 

 spire raised; whorls few, rounded; last whorl 

 large ; umbilicus wide ; aperture rounded. 



A. Adams. (Skenea.) Ann. and Mag. of Nat. Hist., 1860. 



Tubiola cornuella, A. Adams, 1863. 



Hab. Japan. 



Species 22. (Fig. a, h, Mus. Hanley.) 



Cyclostrema divisa. Cyc. testa turhinatd, spird ele- 

 vatd, apice ohtuso ; anfractibus tribus, rotinulis ; 

 ultimo anfractu oblique declivi, a penultimo 

 separata ; aperturd oblique ovatd. 



The divided Cyclostrema. Shell turbinated, spire 

 elevated, apex obtuse ; whorls three, rounded ; 

 last whorl obliquely sloped downwards, separated 

 from the penultimate ; aperture obliquely ovate. 



J. Adams. (Turbo.) Forbes and Hanley's British Mol- 



lusca. 

 Helix serpnloides, Montagu. 

 Hab. British Seas. 



Species 23. (Mus. Adams.) 



CVCLOSTKEMA CRENULIFERA. CyC. fCStd Crassd, ; 



late umbilicatd, longitudinaliter plicuto-rugatd ; 

 suturd canal iculatd ,■ anfractibus ad suturam cre- 

 nulatis ; aperturd siibrotundd; labia externa in- 

 crassato, arcuato ; umbilico ad marginem crenato. 



The crenul.\ted Cyclostkema. Shell thick, globose, 

 broadly umbilicated, longitudinally wrinkled in 

 plaits ; suture canaliculated ; whorls crenulated 

 at the suture ; aperture rather rounded ; outer 

 lip thickened, curved; umbilicus crenatod at the 

 margin. 



A. Adams. Ann. and Mag. of Nat. Hist., 18C3 



Isunda crenuUfera, A. Adams. 



Hab. Japan. 



