AUSTBALIAX LAND SI1ELLS. 77 



Length 1*22; breadth, - 67 ; aperture 0-69 long ; 4 33 broad, of an inch. 

 Habitat. New Holland. Gray. 



187. Bulimus Mastersi. Cox. Plate XIII. Fig 14. M.C. 



Cox, Pro. Zool. Soc, 1867, p. 39. 



Shell imperforate, ovately-conical, rather solid, rugosely-plicate, sculp- 

 tured principally at the suture with interrupted spiral furrows, 

 shining yellow or reddish-brown, adorned with longitudinal bands, 

 formed by coalescent lines, mostly white and porcellaneous ; spire 

 small, convexly- conical, obtuse, suture impressed ; whorls 4, mode- 

 rately convex, the last 4 times exceeding the spire, base rounded ; 

 aperture moderately oblique, angularly oval, faintly showing within 

 the external bands ; peristome simple, straight, slender, white, 

 columellar margin slightly thickened above. 



Length - 74 ; diameter 045 of an inch. 



Habitat. Port Lincoln, South Australia. Masters. 



The coalescent porcellaneous bands, on a darker ground, constitute the 

 most prominent feature of this pretty species, whose nearest ally is 

 B. trilineatus of Western Australia. 



Genus 



ACHATINELLA. Swainsox. 



Shell bulimoid, columella generally with a twisted 

 conical or lamelliform tooth. 



XXXVI. SECTION FBICKELLA. Pfr. Vers. p. 1C6. 



Sub-perforate, oblong ; wall of the aperture furnished 

 with a plate entering spirally inwards ; columellar fold 

 compressed, central ; peristome simple, straight. 



* A. Jacksonensis. * A. Wakefieldise. 



188. Achatinella Jacksonensis. Cox. Plate XII. Fig. 15, 

 natural size and magnified. M.C. 



Bulimus Jacksonensis. Cox, Catalogue of Australian Land Shells, 

 p. 25, 1864. 



Shell sub -perforate, oblong turreted, very thin, translucent, rather 

 shining, smooth, under the lens shewing faint longitudinal striae, 

 yellowish-horny ; spire elongated, gradually tapering, rather blunt 

 at the apex ; whorls 5 to 6, slightly convex, last equalling \ of the 

 length ; aperture irregularly ovate, with a thin central, vertical, 

 parietal plate ; columella twisted, its edge entering spirally inwards, 

 leaving above it a deep entering groove or channel; peristome simple, 

 acute. 



Length - 14 ; breadth 0*06 ; aperture - 05 lonq, of an inch. 



