186 PARTULA, TAHITI. 



Length 20, diam. 10 mm. Sinistral specimen. 

 Length 16, diam. 9mm. Sinistral specimen." 



The following form has been referred to otakeitana as a 

 synonym by Garrett and Hartman. "Bulimus isabellinus 

 Pfr. Shell subperforate, oblong-conic, solid, striatulate, isa- 

 belline. Spire conic, rather acute. Whorls 5, a little con- 

 vex, the upper sculptured with impressed, very delicate spiral 

 lines, the last, a little shorter than the spire, base rounded 

 in front. Columella white, plicate-gibbous. Aperture ob- 

 long-oval, narrowed by a dentiform callus deep within on 

 the belly of the penultimate whorl. Peristome callous, white, 

 broadly expanded, a little reflexed, the columellar margin 

 dilated, sinuous-reflexed. Length 22, diam. 10, aperture in- 

 side 9 mm. long, 4!/o wide. Habitat unknown, Mus. Cuming. ' ' 

 (Pfr.) Reeve's figure is copied, pi. 26, fig. 16. 



P. Iccvigata Pfr. is doubtless a Society Island shell, prob- 

 ably a form of P. otaheitana. The description follows: 



P. Iccvigata, Pf eiff er. ' ' Shell deeply rimate, ovate-conic, 

 solid, smooth, (slightly striatulate under the lens), glossy, 

 buff. Spire conic, rather obtuse; suture moderate. Whorls 

 5, a little convex, the last about equal to the spire, more 

 swollen next the suture, rounded at base. Columella in- 

 wardly nodose-plicate above the middle. Aperture slightly 

 oblique, oblong, obstructed by a deeply placed tubercle on 

 the penultimate whorl; peristome thick, white, spreading 

 throughout, the columellar margin dilated and adnate above. 

 Length 20, diam. 10 mm. ; aperture with peristome 11 mm. 

 long, 4 wide inside. Habitat unknown (Cuming coll.)." 

 (Pfr.). 



Partula lavigata PFR., P. Z. S. 1856, p. 334; Monogr. 

 iv, p. 511. 



lla. P. o. LIGNARIA Pse (pi. 25, figs. 1, 2, 3, 4.) "In a 

 valley about two miles west of Fautaua, there exists in abund- 

 ance the variety ( ? ) lignaria, Pease, which, though described 

 as dextral, is nevertheless very frequently sinistral. Though 

 not attaining quite so large a size as the Fautaua shells, it 

 differs none in shape, but is usually darker colored and 



