PARTULA, RAIATEA AND TAHAA. 225 



P. HEBE BELLA 'Pse.' Hartman (pi. 21, figs. 4, 8) has the 

 spire orange rose colored, usually darker towards the apex. 

 The surface is glossy, covered with a very thin yellow cuticle 

 which is usually deciduous in part, or is entirely lost, 

 when the whole surface is lusterless. The shell is often 

 more solid than typical P. hebe. This form was named 

 P. globosa and P. h. bella by Pease many years ago, but it 

 was in no manner described until Dr. Hartman reported on 

 Pease's duplicates. 



I am unable to find much cause for recognizing var. 

 ventricosa Garrett, 1884 (pi. 21, figs. 6, 7). It "is usually 

 a little smaller than the type, not decorticated, and is more 

 variable in color, but never banded. The ground color varies 

 from whitish to fulvous, rarely with a reddish spire, but 

 more frequently with the apex of a purple-brown." (Gar- 

 rett}. The cuticle is decidedly thicker than in other forms 

 of hebe; it peels off in an area behind the lip, but is else- 

 where persistent. The parietal tooth is smaller than in other 

 forms of hebe. Figured from examples received from Grar- 

 rett. This form is probably what Dr. Hartman refers to as 

 "P. ventrosa Pse." (t. c., p. 193). It approaches P. cras- 

 silabris, a ground species, but differs by its much larger 

 parietal tooth, etc. 



28. P. CRASSILABRIS Pease. PI. 21, figs. 5, 9, 10. 



The shell is umbilicate, short, ovate-conic, moderately thick. 

 Surface rather dull, lightly marked with growth-lines and 

 usually showing engraved spiral lines distinctly on all the 

 whorls; brown or corneous-brown, the base darker, spire or 

 apex usually purplish-brown; periphery frequently (and 

 typically) encircled with a yellow belt or line. The conic 

 spire has straight sides; whorls 4%, only slightly convex, the 

 last rotund. The aperture is small, rounded-ovate, dark 

 flesh-colored inside. Peristome expanded, thick in adult 

 shells, thickened within, its face convex, white, or brownish 

 towards the outer edge. Outer lip is a little narrower above, 

 but not dentate ; at the insertion it gives off a short parietal 



