PARTULA, HERVEY IS. 261 



has stated that the Raiatean P. ~kebe is found on Mangaia 

 (Journ. de Conchyl. 1870, p. 401) 'but his records occasion- 

 ally prove erroneous, and this one seems doubtful. 



52. P. ASSIMILIS Pease. PI. 41, figs. 5, 9. 



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

 corneous or faintly yellowish-corneous, nearly uniform, but 

 under a lens it appears to be very indistinctly marked with 

 pale brown streaks; the early whorls are sometimes pale 

 brown. 2y s embryonic whorls with the usual subpunctate 

 spiral lines, succeeding whorls finely weakly striate spirally, 

 convex. The last whorl is quite convex, very indistinctly 

 marked with more or less effaced spiral lines, or they may 

 be almost wholly absent. Aperture slightly oblique, white 

 or flesh-tinted within. Peristome white or flesh-colored, re- 

 flexed and somewhat thickened within. Columellar lip di- 

 lated above. 



Length 18.3, diam. 10.5, aperture 10 mm. ; whorls 5. 



Length 17.2, diam. 10, aperture 9.3 mm. ; whorls 4%. 



"Length 17, diam. 9 mm." (Pse.). 



Hervey Is. : Rarotonga (Pease). 



Partula assimilis Pse., Amer. Journ. of Conch, iii, p. 230, 

 pi. 15, f. 28, 29. Journ. de Gonchyl. 1870, p. 401, with var. 

 virgulata Pse. PFR., Monogr. viii, p. 197. Cf. GARRETT, 

 Journ. A. N. S. Phila. ix, 1884, p. 80. Partula, cookiana 

 'Mouss.,' Schmeltz, Museum Godeffroy Catalog v, 1874, p. 92 

 (name only). 



This species closely resembles the pale, yellowish form of 

 P. varia of Huaheine, but differs by the thinner, less conic 

 shell, with the spire more swollen, apex more obtuse and 

 the lip is less thickened within. 



Pease has described a "var. virgulata, shell generally 

 shorter than the typical form, longitudinally streaked with 

 light red; alt. 15, diam 9 mm. Rarotonga." 



Two specimens out of the Pease duplicates, from a series 

 received from Dr. Hartman, have the summit purplish, like 

 the form of P. varia figured on pi. 23, fig. 4, yet I do not 

 feel certain that they are really from Rarotonga. 



