PARTULA, MOOREA. 201 



dilute yellow, fleshy-corneous or soiled white, the first whorl 

 almost always -brown ; rarely the last whorl is streaked with 

 buff (fig. 19), or has three pale brown spiral bands (fig. 17). 

 Surface shining, rather densely marked with spiral striae 

 throughout. Spire straightly conic ; whorls 5, only very 

 slightly convex, the last compressed laterally, convex below. 

 The aperture is quite oblique, peristome is well reflexed, 

 strongly thickened within, much narrower in its upper third. 

 Columellar margin dilated at the insertion. There is usually 

 a rather thick but transparent parietal callus and a well- 

 developed parietal tooth. Length 18.5, diam. 11, length of 

 aperture 10 mm. 



Moorea: Vaianai valley, on the southeast coast. 



Partula nworeana HARTMAN, Proc. Acad. Nat. Sci. Phila., 

 1880, p. 229; Cat. Part., p. 10; Obs. Gen. Part., Bull. Mus. 

 Comp. Zool., ix, p. 184. GARRETT, Terrestrial Mollusca in- 

 habiting the Society Islands, Journ. A. N. S. P. ix, 1884, p. 

 59, pi. 3, f. 55. 



P. nworeana "may be characterized by its elongate-ovate 

 form, rather thin texture, constant parietal tooth, planulate- 

 conical spire, which equals half the length of the shell, pale 

 luteous color, with darker apex. It is alivays sinistral, and 

 the white expanded lip is rather thin and moderately incras- 

 sated. A variety with three narrow pale brown revolving 

 bands is not infrequent. 



"It is closely related to some of the sinistral forms of 

 varieties of P. otaheitana, particularly with Pease's P. crassa, 

 which, though of the same shape, is more solid, rougher, and 

 the fine crowded spiral incised lines which extend over the 

 whole surface of the former are nearly obsolete on the latter." 

 (Oarrett). 



19. P. SUTURALIS Pfeiffer. PL 27, figs. 10, 11; pi. 28, figs. 

 1 to 6, 8. 



Shell narrowly perforate, oblong-conic, thin, distinctly 

 striate spirally; fulvous-buff irregularly painted with chest- 

 nut streaks. Spire convexly conic, acute; suture margined 



