PARTULINA, SECTION BALDWINIA. 109 



stages, this species is more evolved than other Hawaiian Bald- 

 winias. 



48. P. PHYSA (Newcomb). PI. 17, figs. 6 to 13. 



* ' Shell sinistral, acutely conical, thin, inflated. Whorls 5, 

 rounded; suture well marked. Aperture widely ovate; colu- 

 mella thin, slightly twisted ; lip simple. Color light yellowish 

 brown with white longitudinal flammules, with or without a 

 subcentral revolving white line on the body-whorl. Length 

 11, diam. five-twentieths of an inch " (Newc.). 



Hawaii: Mauna Kea (Newcomb) ; Hamakua (J. Lewis 

 Homer) ; Waimea Plains, Hamakua. Chiefly on dead trees 

 but sometimes on living lehua (D. Thaanum). 



Achatinella physa NEWC., P. Z. S., 1853, p. 152, pi. 24, f. 

 64, 1854. SYKES, Fauna Hawaiiensis, Mollusca, p. 316. 

 Achatinella hawaiiensis BALDWIN, Proc. A. N. S. Phila., 1895, 

 p. 225, pi. 10, f. 24-26 (Hamakua). GWATKIN, t. c., p. 238 

 (radula). THWING, Reprint Orig. Descript. Achat, 1907, 

 pi. 2, f. 22. 



Smaller and less roughened than P. confusa, and differing 

 in coloration. Some shells have very much the pattern of the 

 young stage of confusa. Newcomb 's original description and 

 figure (copied in pi. 17, fig. 6) are given above. A. hawaiien- 

 sis Baldwin is figured from the type lot sent by Mr. Baldwin, 

 pi. 17, figs. 7, 8, 13. It is believed by Mr. Sykes to be iden- 

 tical with Newcomb 's original A. physa, an opinion in which 

 I agree, having gone over the matter carefully with Dr. Cooke 

 and Mr. Thaanum. 



A. physa varies widely in color-pattern, as follows: 

 (a) White, with brown oblique or zigzag streaks above a 

 narrow peripheral brown band, and having a broad brown 

 zone on the base (pi. 17, figs. 7, 8). 



(fr) White, with more or less brown on the spire, the 

 peripheral brown band and basal zone more or less inter- 

 rupted (fig. 13). 



(c) Brown, indistinctly mottled and streaked with cream- 

 color, with a subperipheral band of the same or of white (fig. 

 9). 



