292 PARTULA, SOLOMON ISLANDS. 



cate, thin, pale gray-buff, slightly shining. Embryonic 

 whorls are very minutely sculptured with spiral puncture- 

 lines, the junction with the after-growth not distinct; whorls 

 somewhat convex, separated by a well-impressed suture, which 

 is narrowly bordered above, the border defined by an im- 

 pressed line ; last whorl is strongly compressed laterally, sac- 

 cate at base, and a little concave just below the suture. Post- 

 embryonic sculpture of strongly developed spiral striae and 

 irregular growth-lines (very similar to that of P. regularis, 

 fig. 11) ; behind the outer lip the surface is opaque and often 

 of a brighter yellow tint. Aperture ovate, hardly oblique, 

 bluish white within. Peristome reflexed, thickened within 

 except near the upper angle where it is thin. Columellar mar- 

 gin oblique, dilated above. Parietal callus thin. 



Length 18, diam. 9.5, aperture 9 mm. ; whorls 5%. 



Length 17, diam. 8.6, aperture 8 mm. ; whorls 5~y 3 . 

 Solomon Islands: Rubiana (Brazier). 



Partula incurvum HARTMAN, Proc. A. N. S. Phila. 1886, 

 p. 31, pi. 2, f. 3. 



By its strong spiral sculpture this species is close to P. 

 regularis, but it is more lengthened than that, with less con- 

 vex whorls, the last one more flattened laterally and more 

 sack-like below. P. hastula resembles incurva, but it is far 

 less strongly sculptured. Description and figures from the 

 type, no. 4240 Carnegie Museum. 



84. P. REGULARIS Hartman. PL 35, figs. 11, 14. 



The shell is ovate-conic, rather thin, nearly lusterless, of 

 a pale gray-buff tint. Sculpture of close, strongly developed 

 spiral striae as wide as 'their intervals, (pi. 35, fig. 11, last 

 whorl behind aperture x 25) . Spire conic, the whorl rather 

 convex; last half of the last whorl is a little compressed 

 laterally, and the base is very convex ; umbilicus deep, rather 

 open. Aperture oval, bluish- white within ; peristome thin, re- 

 flexed, thickened within except near the upper end. 



Length 17, diam. 9.8, aperture 9 mm. ; whorls 5%. 



Length 16.9, diam. 9.5, aperture 9 mm. ; whorls 5. 



