PARTULINA, MOLOKAI. 79 



color-patterns. The same color-pattern occurs in Kilohana. 

 There is a similarly marked form of polita. 



430. P. MIGHELSIANA BELLA (Reeve). PI. 23, figS. 2 to 12; pi. 



26, f. 13 to 15e. 



' ' Shell conical, dextral, whorls rather ventricose, columella 

 with a twisted plait. Olive-yellow, sutures black-brown, then 

 white-banded, last whorl brown and white banded. The dark 

 sutural band is sometimes absent in the last whorl, but the 

 white band appears constant " (Reeve). 



" Animal of a uniform yellowish- white, with slate colored 

 tentacles " (Newcomb). 



Molokai (Cuming coll.), Puunea, on leaves of small trees 

 (Cooke and Pilsbry), Kalae, Kealia, Kaupelua, Waileia, 

 Kaunakakai, Maunahui, Hanakalilolilo, Kawela, Ualapue and 

 Kaluaaha (Borcherding, Meyer coll.). 



Achatinella bella REEVE, Conch. Icon., vi, pi. 3, f. 17, April, 

 1850. PFEIFER, Monogr. iii, 461. SYKES, Fauna Hawaiien- 

 sis, p. 321. NEWCOMB, Ann. Lye. N. H., vi, p. 316 (animal). 

 BALDWIN, Catalogue, p. 6. THWING, Reprint Orig. De- 

 script. Achat., pi. 2, f. 5. Acliatinellastrum ~bella Rve., BOR- 

 CHERDING, Zoologica, xix, p. 77, pi. 6, f. 11-20. 



The shell is dextral in the large number seen. The early 

 whorls are closely striate spirally, but the last whorl has only 

 faint traces of spirals on the glossy surface. Columellar fold 

 very strong. Axis imperforate. The spire is shorter and 

 stouter than in mighelsiana, but it must be admitted that 

 some forms, such as color-var. e, approach that species. P. 

 polita differs chiefly by its bulging last whorl, narrower spire 

 and diverse coloration wanting white bands. 



In my opinion, supported by Dr. Cooke, the forms figured 

 for polita by Borcherding, on his plate 8, figures 1 to 7, per- 

 tain to bella. 



The color-forms are as follows: (a) Typical form; em- 

 bryonic whorls white or black-tipped ; last whorl yellow with 

 a chestnut band bordering the suture followed by a white 

 band, another just below the periphery with a white band 

 above it; columella fleshy-brown, the tooth and aperture 



