PARTULA, MARQUESAS ISLANDS. 173 



next two whorls of the embryonic shell are rather coarsely 

 pitted in spiral lines, following whorls marked with fine 

 growth-lines and very fine spiral strise, most distinct at the 

 base. The aperture is oblique, ovate ; peristome broad, white 

 flatly reflexed, thickened within except near the upper angle. 

 Length 21.5, diam. 12.5, aperture 12 mm. 



Marquesas: Nukahiva, abundant on trees. 



P. recta PSE., Amer. Journ. of Conch, iv, 1868, p. 155, pi. 

 12, f. 8; P. Z. S. 1871, p. 473. Hartman, Catal. Gen. Par- 

 tula p. 12 ; Proc. A. N. S. Phila. 1885, p. 220. GARRETT, Bull. 

 Soc. Malac. France, iv, 1887, p. 25. 



4. P. BELLULA Hartman. PL 30, figs. 17, 18, 19. 



The shell is rather narrowly umbilicate, ovate-conic, thin, 

 covered with a very pale olive or greenish-yellow cuticle with 

 inconspicuous darker streaks, the embryonic whorls pale 

 flesh-tinted. Surface somewhat shining, with sculpture of 

 fine spiral striae which are crowded and wavy on the base, 

 but separated by spaces much wider than the impressed lines 

 on the upper part of the last whorl. 2^ embryonic whorls 

 (fig. 19) have the coarse pitting of other Marquesan species. 

 Spire short, straightly conic ; whorls 4^, moderately convex, 

 the last inflated, almost equably convex, 'but the base is es- 

 pecially so. Aperture oblique, ovate; peristome reflected, 

 gray, in fully adult shells having a narrow white callous rim 

 at the inner edge, not extending to the upper termination of 

 the outer lip. Columellar lip dilated. 



Length 14.2, diam. 9.7, aperture 8.5 mm., (type). 



Length 16, diam. 9.9, aperture 9 mm. 



Length 14.5, diam. 9.7, aperture 9 mm. 



Marquesas Is. : Huapu I., type loc. ; Dominique or Hivaoa 

 Island (Garrett). 



Partula bellula HARTMAN, Proc. A. N. S. Phila. 1885, p. 

 203, fig. in text (Sept. 1, 1885). GARRETT, Bull. Soc. Malac. 

 France iv, 1887, p. 27. 



This species is more slender than P. decussatula, with a 

 smaller aperture, and the spiral striation is much less crowded 



