56 PARTULINA, MAUL 



specimen shows faint traces near the lip of numerous other 

 bands, thus approaching var. fasciata. 



In a series from Lahaina the shell is pure white at all stages 

 of growth, or there may be some faintly sketched yellowish 

 spiral lines below the periphery, which is acutely angular in 

 front in the young. The fine descending striae are more distinct 

 in most specimens (pi. 12, figs. 2, 3). 



28a. P. tappanianafasciata (Gulick). PI. 12, figs. 5, 6, 7. 



Shell sinistral, sometimes perforate, ovate-conic, solid, shin- 

 ing, finely striated, microscopically very minutely and faintly 

 decussated, white, with brown bands; apex subacute, white, 

 with a brown line above the suture; spire regularly conical; 

 whorls 6 or 7, convex, not margined; the last rounded, equal to 

 T 6 ^ of the length; columellar fold white, superior, slightly 

 developed, moderately twisted; aperture somewhat oblique, 

 roundly oval, white within; the bands sometimes appear in pale 

 brownish stripes in the inner surface; peristome white, slightly 

 thickened, subreflected anteriorly; with columellar margin re- 

 flected, scarcely adnate; parietal margin wanting. Average 

 length 22; greatest length 25; broadest 11 \\ length of aperture 

 10mm. Average weight 6.8 grains; greatest weight 9 grains; 

 least weight 6 grains. ( Gulick. ) 



Maui: Honukawai, on the wiliwili (Erythrina monosperma') , 

 S. T. Alexander. 



Var. b. Thicker and more elongate, with dark brown or black 

 bands; lip well thickened within, and deeply colored on the edge 

 opposite the bands; columella slightly toothed. 



Var. c. Ventricose, conical; one specimen has the following 

 dimensions: Length 0.86; breadth 0.54; length of aperture 0.40 

 inch. 



Remarks. Has been confounded with A. tappaniana and A. 

 splendida Newc., but is smaller than the former, with fainter 

 sculpturing and more regularly conical spire; it also differs in 

 its dark bands, rounded body whorl, less reflected lip, and 

 slight columellar fold. It resembles A. splendida Newc. in its 

 brown bands, but is otherwise quite distinct. A nuclear char- 

 acter which distinguishes it from either of the above is the spiral 

 line on the first whorls. (Gulick.) 



