Suteb.— A Neiu Placostylus from, Neiv Zealand. 341 



to Captain J. Pollons for his courtesy and the trouble he has 

 taken to procure the specimens. 



The following is a description of the very remarkable new 

 species : — 



Placostylus bollonsi, n. sp. Plate XXV, figs, a, b, c. 



Shell large, oblong-conic, with a very obtuse apex, rimate, 

 fairly solid, axially closely striate, brown, peristome simple. 

 Sculpture : The first 3 whorls are finely and regularly axially 

 costate and mostly not punctate ; the 3rd and sometimes the 

 4th and part of the 5th whorl distinctly broadly plicate at the 

 suture above ; the following whorls are densely wrinkle-striate, 

 the striae of unequal strength, slightly oblique and crossed 

 by distant spiral strise, which are mostly obsolete upon the 

 base. Some examples show a secondary axial sculpture on the 

 4th and 5th whorl, consisting of strongly oblique costse, which 

 are directed forwards, and reticulate the primary axial sculp- 

 ture, forming a more or less distinct network. On the last 2 

 whorls a distinct narrow groove is margining the suture below. 

 Colour yellowish-brown, ■with numerous narrow blackish-brown 

 streaks on the lower whorls, the apical whorls usually denuded 

 and flesh-coloured ; peristome white, aperture purplish-red 

 within ; a whitish narrow subsutural border is sometimes pre- 

 sent, but it is much less conspicuous than in P. hongii and very 

 often wanting. Epidermis brown, thin, slightly shining. Spire 

 elevated-conic, with a very blunt apex, 1J to 1| times the height 

 of the aperture ; outlines very slightly convex. Protoconch 

 of 3 convex whorls, the nucleus with a raised inner carina. 

 Whorls 6J, the first few but little descending, lightly convex ; 

 base flatly rounded. Suture not deep, somewhat uneven, 

 margined below on the lower whorls. Aperture vertical, pyri- 

 form, angled above, broadly rounded and somewhat angled 

 towards the pillar below. Peristome continuous ; outer lip 

 not expanded and not much thickened, rounded and smooth, 

 rarelv with very slight indications of denticles within. Basal 

 lip slightly expanded, smooth or with a few indistinct notches. 

 Columella oblique, lightly concave, indistinctly folded above ; 

 inner lip not broad, with a well-marked rim forming the con- 

 tinuation of the basal lip ; very rarely a few small tubercles 

 may be found on the lower part of the parietal wall, but usually 

 it is quite smooth. The umbilical fissure is always small. 



Diameter, 40 mm. ; height, 91 mm. Type. 



Diameter, 43 mm. ; height, 99 mm. One of the largest 

 specimens. 



Animal black, irregularly and coarsely granular, the granules 

 arranged in longitudinal rows on the back, sloping on the sides, 

 a band of squarish and large granules along the pedal margin. 



