82 PARTULINA, MOLOKAI. 



P. polita differs from P. ~bella by its bulging last whorl, 

 which gives the sides of the spire a concave outline. In hello, 

 the general outlines of the spire are straight. The color- 

 patterns are also different. P. polita is never white and never 

 has white bands on the last whorl. It is also more distinctly 

 striated spirally, the striae visible though often weak on the 

 last whorl. 



Color-form latizona Borcherding. PL 23, fig. 13. Shell 

 dextral, conic-ova.te, rather solid, glossy, very delicately lon- 

 gitudinally striate; epidermis pale-yellow, the whorls en- 

 circled in the middle with a broad chestnut-brown band ; spire 

 conic; suture margined, impressed. Whorls 5^, weakly con- 

 vex, the last scarcely broader than the spire. Columella 

 having a small, short, white tubercle. Aperture oblique, in 

 versely auriform, pale violet ; peristome simple, unexpanded, 

 red-lipped within. Length 14, diam. 8 mm. Kaamola, Meyer 

 (Borcherding) . 



Acliatinellastrum latizona BORCH., Zoologica, xix, Heft 48 1 , 

 p. 82, pi. 8, f. 10, 1906. 



Doctor Cooke collected this form in Kaluaaha and Mapu- 

 lehu. It is a further development of the ordinary banded 

 polita. 



Color-form dixoni Borcherding. PL 23, figs. 14, 15, 16. 



Shell dextral, ovate-conic, rather solid, glossy, deep chest- 

 nut-brown, the upper whorls and a patch around the umbili- 

 cus yellow; very delicately striated longitudinally. Spire 

 conic; suture margined, impressed; whorls 5^, weakly con- 

 vex, the last rounded, scarcely half the total length of the 

 shell. Columella having a small short, flesh-red or dirty- 

 purple tooth. Aperture oblique, half-oval, gray- violet; peri- 

 stome simple, unexpanded. Length 14, diam. 8 to 9 mm. Ka- 

 wela and Kaamola, Meyer (Borcherding). 



Acliatinellastrum dixoni BORCH., Zoologica, xix, p. 83, pi. 

 8, f. 11, 12, 13, 14, 1906. 



" This species occurs in the above-mentioned localities in 

 a darker and a lighter coloring. Fig. 14 comes from Kawela, 

 has a dark columellar tooth and no yellow patch around the 

 umbilicus. Others from Kawela and fig. 15 from Kaamola 



