1880.] MR. CRAVEN ON SHELLS FROM SOUTH AFRICA. 619 



Ennea NATALENSis, sp. nov. (Plate LVII. fig. 7.) 

 Shell elliptically conical, subperforate, semitranspareut, pale yel- 

 lowish green, rather glossy, finely and indistinctly obliquely costulated, 

 excepting near the suture ; the base of last whorl regularly lirate ; 

 suture moderately distinct, coarsely crenulated between the last 

 three whorls ; whorls 8 J, scarcely convex, very gradually increasing 

 till the last one, which occupies about two fifths of the entire shell , 

 apex very obtuse ; aperture angularly semioval ; paries furnished 

 with a thin, short, curved lamella, placed near the outer lip, but not 

 contiguous to it ; outer lip armed with a small tooth near the 

 centre; columella furnished with two small teeth, one near the 

 centre and one near the base ; peristome somewhat ex])auded and 

 reflexed. Length 9 millims., greatest diameter 5, diameter of aper- 

 ture 2.1. 



Localiti/. Two specimens found near the lighthouse at the entrance 

 of Durham Harbour, Port Natal. 



Cyclotus alabastris, sp. nov. (Plate LVII. fig. 9.) 

 Shell depressed, discoid, widely umbilicate, semitranspareut, of a 

 pure white colour, rather glossy, vitreous, faintly obliquely striated ; 

 spire but little raised ; apex moniliform, raised" suddenly above the 

 penultimate whorl ; umbilicus very large, perspective, exposing all 

 the whorls; whorls J|, very convex^ the last descending considerably; 

 suture deep and well defined ; aperture obliquely circular ; peristome 

 simple, continuous. Greatest diameter 57 mi'llims., least diameter 

 4-8, diameter of aperture 1-6, height from base of aperture to apex 3. 

 Locality. Cape Recif, entrance of Algoa Bay. 



Helix glouosus, Miill, (Verm. ii. p. (i8. no. 2G4). 



I must also mention having found a fully developed sinistral speci- 

 men of this species in company with immense numbers of the 

 normal dextral form on Robbeu Island in Table Bay, Cape Colony. 



EXPLANATION OF PLATE LVIL 



Pig. 1. Jchaiinu gmithii, p. (517. 



'2. a, I). Hdiv si/iiuactrica, p. U14. 



o. a, h. Vitrina iransvaaJoms, p. 6I;3. 



4. a, h. vitndcnhroecJiii, p. 615. 



r>. a~c. Ennca cransihdtris. p. GKi. 



6. a-c. iiifans, p. Cl(i. 



7. a-c. nafalengis, p. (il9. 



8. a-c. Ptqm shiisfrorsci, p. 618. 



9. (I, h. Cyclotus alabastris, p. (il9. 



10. a, b. Phi/sa lirata, p. 617. 



11. u,b. Anci/lus transva'densis, ■^. (Ml , 



12. it-d. Corbtfiila ulijjhitiifcnsis 618. 



41* 



