204 PARTULA, MOOREA. 



P. strigosa Pfr. is probably, as Garrett and Hartman have 

 held, a form of suturalis. It w*as described as follows : ' ' Shell 

 perforate, oblong-conic, rather solid, very obsoletely decus- 

 sate, subopaque; whitish, ornamented with irregular fulvous 

 and rufous streaks. Spire conic, the apex acute. "Whorls 5, 

 nearly flat, the last slightly shorter than the spire, somewhat 

 tapering at the base, rounded. Columella somewhat twisted 

 above, subnodose at base. Aperture slightly oblique, trun- 

 cate-oval, generally contracted by a nodiform parietal callus. 

 Peristome white, callous, subequally spreading throughout. 

 Length 17 to 18, diam. 9 mm., aperture with peristome 8% x 

 6% mm., inside 3% mm. wide. Admiralty Is." (P. strigosa 

 PFR., P. Z. S. 1856, p. 384). 



19&. P. SUTURALIS VEXILLUM Pease. PL 27, fig. 9 ; pi. 28, figs. 

 9-12. 



The shell is typically dextral, more lengthened than the 

 preceding, less compact, and somewhat thinner. On a corn- 

 eous-buff ground it is obliquely streaked with opaque buff 

 on the last whorl, and begirt with two chestnut bands, the 

 upper one ascending on the penult, whorl. Parietal tooth 

 well-developed. Spiral striation wanting or extremely weak 

 on the last whorl. Sutural white line inconspicuous or even 

 wanting. Length 21, diam. 11%, length of aperture 11 mm. 

 Description and fig. 9 are from one of Pease's original lot. 

 Other shells are somewhat smaller, length 18 mm., and the 

 oblique streaks may be less distinct. 



Many examples were collected by Andrew Garrett, who 

 found it variable. Some shells are dark chestnut with a 

 white sutural line (fig. 10) ; others are like Pease's original 

 lot, or have a third band, around the umbilicus (fig. 11) ; 

 while some shells are finely streaked brown and buff, without 

 any bands (fig. 12) . Garrett writes as follows : ' ' This beau- 

 tiful arboreal species is found in great profusion in Vaianai 

 valley, on the southeast coast of Moorea, where it occurs in 

 company with P. mooreana and P. elongata. It also exists 

 in considerable numbers in a small valley about two miles to 

 the westward, associated with P. tceniata and elongata. 



