298 PARTULA, NEW IRELAND, ETC. 



spirals, the intervals as -wide as the striae; embryonic sculp- 

 ture indistinct, -being worn. Whorls 4%, convex, the latter 

 part of the last whorl somewhat flattened laterally and ; 

 slightly concave just below the suture, which is whitish. 

 Aperture slightly oblique, oval; peristome continuous, the 

 outer lip slightly expanded, thickened within except near 

 the posterior 'angle ; parietal callus heavy for so small a shell, 

 its edge distinctly raised. Umbilical chink short but deep. 

 Length 11, diam. 6.9, aperture including peristome 6x4 mm. 



Another specimen (pi. 36, fig. 5) from Dr. Cox, (no. 59873 

 A. N. S. P.), measures, length 11, diam. 6.7, aperture 6.5 mm. 

 long. It is similar but has the corneous cuticle entire and 

 the parietal callus weak in 'the middle. There is a narrow 

 slightly prominent though hardly raised girdle at the peri- 

 phery, where the cuticle is more persistent, 'and this is visible 

 above the suture for a short distance behind the aperture. 

 This structure is so weak that it might readily be overlooked, 

 but it is visible in both of the examples seen. The aperture 

 is decidedly oblique in this shell. 



This species has a shorter spire than the preceding forms 

 and is a little smaller, otherwise they seem to be closely 

 related. 



VIII. BISMARK ARCHIPELAGO (New Ireland, New Britain 

 etc.), and ADMIRALTY Is. 



The species of these islands are closely related to those of 

 the Solomon group, and belong to the same section. 



92. P. CARTERIENSIS (Quoy & Gaimard). PI. 36, figs. 15, 16, 



17, 18. 



1 1 Shell elongate, apex acute, perforate, transversely and 

 longitudinally striate, fulvous. Aperture oval, inflected, 

 peristome wide, reflexed. Whorls 5, the last ventricose, larger 

 than the rest. 



"This species is more lengthened and especially more acute 

 than the preceding [P. vanicorensis] ; the whorls of the spire 

 are well spaced and separated by a quite deep suture; the 

 last whorl, a little larger than the others together, is still but 



