Buttaria.] GASTROPODA. 535 



ous oblique growth-lines, with occasional periods of rest ; the whole 

 shell microscopically finely and densely spirally striated, the strise 

 distinctly wavy ; on the base there are a number of distant linear 

 spiral grooves. Colour usually light yellow or grey, marbled with 

 light brown, sometimes with 1 or 2 darker spiral bands ; aperture 

 light olive inside ; inner lip white. Spire sunken, vertex with a narrow 

 deep not perspective umbilicus, with spiral striation. Body-whorl 

 elongate-oval, narrowed above, convex, but somewhat flattened on 

 the last half-turn ; base rounded. Aperture high, extending beyond 

 the spire, narrow above, enlarged toward the base. Outer lip thin and 

 sharp, sometimes slightly strengthened inside by a narrow white callus, 

 narrowly rounded above, flatly convex in the middle. Basal lip 

 regularly arched. Columella subvertical, short, concave. Inner lip 

 reflexed over the pillar, spreading over the convex parietal wall. 



Diameter, 26 mm. ; height, 50 mm. (type). Diameter, 22 mm. ; 

 height, 36 mm. (large Auckland specimen). 



Animal similar to that of the subspecies. 



Type in the Mus. Hist. Nat., Paris. 



f{ab. Coasts of the North Island, on sandy mud, from low water 

 to 5 fathoms. Also Australia and Tasmania. The type is from 

 King George's Sound, Western Australia. 



Remarks. New Zealand specimens perfectly agree with those from 

 Port Jackson, but they are mostly much smaller. They are not so 

 much narrowed above as the type. Gray's descriptions are quite 

 inadequate, and not accompanied by a figure. 



Fossil in the Pleistocene of Australia. 



Subsp. Quoyi, Gray, 1843. 



Bulla Quoyi, Gray, Dieff. N.Z., 243; Ereb. & Ter., 5, pi. 1, f. 11 ; M.N.Z.M., 

 121. B. striata, Lam., Voy. Astrol., ii, 354, pi. 26, f. 8, 9, not of 

 Lamarck ; not B. Quoyi of A. Adams, Sowerby, nor Carpenter. B. Quoyi, 

 Gray, Man. Conch. (1), xv, 348, pi. 39, f. 71. Bulla (Haminea) castanea, 

 A. Ad., Thes. Conch., ii, 584, pi. 124, f. 106a. 



Shell rather large, solid, oval-cylindric, smooth, with spiral grooves 

 at the base and in the apical umbilicus ; colour mostly reddish-brown. 

 Sculpture consisting of well-marked oblique growth-hues ; there are 

 a number of distant linear spiral grooves at the base ; the microscopic 

 fine spiral striae of the species are absent or inconspicuous. Colour 

 indistinctly and closely marbled with fleshy purple-grey on a pale 

 ground, with 2 or 3 ill-defined encircling zones of heavier darker 

 mottling, but usually the shell is uniformly reddish-brown, with indica- 

 tions of 2 or 3 darker spiral bands ; aperture greyish-white inside, 

 inner lip white, in all other characters the subspecies agrees with 

 the species. 



Diameter, 16 mm. ; height, 25 mm. (type). Diameter. 27 mm. ; 

 height, 44 mm. (Auckland specimen). 



