22 PLACOSTYLUS, NEW ZEALAND. 



SPECIES OF NEW ZEALAND AND LORD HOWE ISLAND. 



These forms are closely allied to those of New Caledonia, and be- 

 long strictly to the typical section of the genus. 



P. SHONGII (Lesson). PI. 11, figs. 5, 6, 7, 8. 



Shell imperforate or rimate, oblong-conic, quite solid and strong; 

 varying from yellow with numerous narrow chestnut streaks, fading 

 at their edges, and crossed by fainter spiral lines and narrow bands, 

 to chestnut with some darker streaks; paler or denuded on the 

 earlier whorls, and with a whitish subsutural border, denuded of 

 cuticle. Surface smoothish, with low longitudinal wrinkles, stronger 

 below the suture. Spire elongate, the apex slightly obtuse. Whorls 

 7 (or in small shells, 6^), moderately convex, the latter part of the 

 last somewhat swollen below and obliquely produced. 



Aperture less than half the length of the shell, vertical, scarlet 

 within, fading to yellow in the throat; peristome whitish, the outer 

 lip expanded, thickened and angular on its face, thickened within, 

 and typically bearing a tubercle near the upper insertion, separated 

 by a short interval from a low r or strong flange, which may be either 

 smooth or denticulate, and which terminates in a strong tubercular 

 tooth close to the base of the columella ; the teeth and flange often 

 subobsolete. Columella scarlet, sloping, concave, sometimes indis- 

 tinctly folded above, far within ; parietal callus strong, scarlet, with 

 whitish outer edge. 



Alt. 84, diam. 38, length of aperture 41 mill. 



Alt. 75, diam. 34, length of aperture 36 mill. 



Alt. 67, diam. 29, length of aperture 32 mill. 



New Zealand : Northern part of the North Island, at North Cape, 

 Gape Maria Van Diemen, Bay of Islands, and Wangoroa. 



Rulimus shongii LESSON, Voy. autour du Monde la Corvette S. M. 

 "La Coqiiille," Zool., ii, p. 321 (1830), pi. 7, f. 4, 5 (1826) Kus- 

 TER, Conchyl. Cab., p. 55, pi. 16, f. 14, 15. PFR., Monogr. ii, p. 

 140; iii, 378; iv, 447 REEVE, Conch. Icon. pi. 24, f. 159.- 

 GOULD, U. S. Expl. Exped., Moll., p. 79, f. 85 (1852). ALB.- 

 MART., Die He!., p. 185 Placostyhts shongii H. & A. Adams, Gen. 



Rec. Moll, ii, p. 153 FRAUENFELD, Verb. Zool.-bot. Ges. Wien, 



1869, p. 874. Bulimus fibratus Gray, in Dieffenbach's New Zea- 

 land, ii, p. 247 (excl. syn.). Bulimus bovinus Brug., PETIT, Journ. 



