56 PLACOSTYLUS, NEW CALEDONIA. 



where the lip again becomes narrower ; parietal callus extremely 

 heavy, bearing a strong median fold ; columella with an oblong and 

 very strong callous fold. 



Length 68, diam. 40 mill. 



Length 67, diam. 36 mill. 



Length 65, diam. 34 mill. 



Gatope, west coast of New Caledonia (Marie). 



Bulimus mariei C. & F., Journ. de Conchyl. 1867, p. 187, pi. 7, 

 f. 1, 2, and variety, f. 3. GASSIES, Faune, ii, p. 78, pi. 5, f. 3. 

 PFR., Monogr. vi, p. 83 Placostylus mariei KOBELT, Conchyl. 

 Cab., p. 19, pi. 3, f. 2-5 ; pi. 6, f. 5. CROSSE, J. de C. 1894, p. 

 277, with var. simplex Crosse and curta Gass. B. mariei var. y 

 curta GASSIES, J. de C. 1869, p. 274; Faune, ii, p. 78. Placosty- 

 lus submariei KOBELT, t. c., p. 17, pi. 3, f. 2 (1891). 



A very solid species, allied to P. porphyrostomus but shorter, with 

 the peristome more thickened, the mouth pure white or very pale 

 within, and the much smoother surface covered to a far greater ex- 

 tent with epidermis. The basal lip has no trace of the notch which 

 distinguishes P. submariei. 



Variety simplex Crosse is based on specimens without brown spiral 

 lines. Var. curta Gassies is shorter, length 60, diam. 38 mill., with 

 the aperture narrower, the columellar fold approaching the callus of 

 the lip. Both are from Gatope, and neither, probably, are true var- 

 ieties in the sense of subspecies. 



P. NECKLIATENSIS Kobelt. PI. 27, figs. 29, 30. 



Shell slightly rimate, long-ovate, solid and thick, somewhat regu- 

 larly costate-striate, sculptured with short spiral lines between the 

 striae ; compressed ; covered with a rather light olive-green, hardly 

 streaked, cuticle. Spire conic, somewhat turreted, worn, flesh-colored ; 

 the apex small, slightly obtuse. Whorls 7, a little convex, regularly 

 increasing, separated by a slightly crenate, white-margined impressed 

 suture, the last whorl elongate but scarcely inflated, nearly double 

 the length of the spire, irregularly compressed, ascending in fronl. 



Aperture slightly oblique, narrow, contracted, brown inside; per- 

 istome very much thickened, bright fleshy-buff, margins connected 

 by a very thick callus bearing a compressed crest in the middle, and 

 an acute, somewhat entering tooth ; the outer lip sinuated above, 

 then rather straightly thickened ; columellar margin vertically as- 



