PLACOSTYLUS, NEW CALEDONIA. 39 



purplish-orange within, with brownish streaks ; peristome orange- 

 whitish, obtuse, slightly thickened, the terminations joined by a thin, 

 brownish, nearly toothless callus ; outer margin produced in the 

 middle, basal margin effuse, columellar margin arcuately ascending, 

 slightly dilated, with a very obsolete fold. Length 69, diam. 36, 

 aperture 40 mill. (Kobelt.) 



Tchio (probably Thio or Tio], on the east coast of New Caledonia. 



Probably not quite fully adult, as Crosse holds. 



Var. subeffusus Kobelt (pi. 23, fig. 4). Shell ex-umbilicate, 

 ovate-acuminate, not very thick, subtranslucent, compressed, rudely 

 striated and malleate, obsoletely spirally lirate and even striate ; 

 whitish, covered with a greenish-chestnut epidermis, indistinctly 

 spirally fasciolate. Spire conic, worn, the upper whorls buff, apex 

 slightly obtuse. Whorls 6^, slightly convex, separated by a some- 

 what ragged, white-spotted suture, regularly increasing ; the last 

 whorl more convex, slightly inflated, compressed, angular along the 

 left margin, exceeding three-fifths the total length, more rapidly de- 

 scending near the aperture. Aperture vertical with receding base, 

 broadly oval, deeply excised by the penult whorl above, orange- 

 brownish inside, pale-edged; perisfeome brownish-orange, obtuse, 

 slightly thickened, lightly expanded, very distinctly effuse at the 

 base, the terminations joined by a thin callus, somewhat thickened 

 in the middle ; outer lip not sinuated above, columellar nearly 

 straight in the middle, and nearly parallel to the slightly arcuate, 

 scarcely dilated columellar margin, which is not folded. Alt. 65, 

 diam. 36, aperture 38 mill. (Kobelt.} 



Tchio, east coast of New Caledonia. 



A form of doubtful relations, known by a single specimen, and 

 chiefly distinguished by the foldless columella, thin texture, and effuse 

 basal lip. 



P. FIBRATUS (Martyn). PI. 15, figs. 15, 16; pi. 16, figs. 21, 22, 24. 

 Typical P. fibratus is a rather uncommon form with a strong 

 parietal nodule, the contour rather slender. Martyn's type figure is 

 copied, pi. 15, fig. 15 ; the other figures referred to above illustrat- 

 ing more or less similar specimens. 



Southern New Caledonia and Isle of Pines. 



Limax fibratus MARTYN, The Universal Conchologist, pi. 25 

 (1789) ; reproduced by Chenu, Biblio. Conch, ii p. 21, pi. 7,f. 3. 



