52 GASTEROPODA. 



FAMILY APLUSTRLD^. 



Shell convolute, veutricose, often thin, ornamented with bauds of 

 brilliant colours ; aperture large. 



APLUSTRUM. 



Smooth, spire short, obtuse ; outer lip thin, produced anteriorly as 

 far as the columella, which is straight, twisted and obliquely truncated 

 in front. 



242. A. lineatum, Wood. Concentrically striated, sub-per- 

 forate, rather thin. White ; body whorl with two rather thin red 

 spiral bands, and several thinner longitudinal red stripes ; anterior 

 part pinkish red ; interior white. Length, "8 ; breadth, '52. 



Hauraki Gulf. Australia. 



FAMILY CYLICHNIDJE. 

 Convoluted, cylindrical. 



CYLICHNA. 



No spire, the apex concave, aperture straight. 



243. C. Striata, sp. nov. Small, smooth, white, longitudinally 

 finely striated ; aperture scarcely produced above the spire. 



Length, '1 ; breadth, '05. 



FAMILY BULLION. 



Shell globular or cylindrical, convoluted, thin ; spire concave, um- 

 bilicated ; aperture long, rounded and sinuated in front ; outer lip 

 sharp. 



BULLA. 



Oval, ventricose, solid, smooth ; aperture longer than the shell. 



244. B. Oblonga, Adams ; J3. australis, Gray, Dieff. N.Z., ii., 

 p. 243. Large, elongated, cylindrical, with a few spiral lines near the 

 base. Chestnut brown, faintly varied with grey. Length, 2 ; breadth, 

 1-1. 



Coasts north of Auckland. Australia. 



245. B. QllOyi, Gray, Dieff. N.Z., ii., p. 243; It. striata, Quoy, 

 I.e., ii.,^?. 354. Ovate, smooth, with a few spiral lines near the base. 

 Olivaceous, marbled with purplish grey, and occasionally with white 

 dots. Length, T4 ; breadth, '9. 



Coasts north of Auckland. 



PLAMINEA. 



Ovate, thin, horny, covered with a thin epidermis, lightly trans- 

 versely striated. 



246. F. obesa, Soiverly; Sulla zealandics, Gray, Dieff". N.Z.,\i., 

 p. 243. Sub-globose, imperforated, pellucid. "White or pale fulvous. 

 Length, 1 ; breadth, 75. 



