PARTULINA. 23 



Kapuna; Moomuku and Honolua (Thaanum). Cotypes in 

 coll. Bishop Museum and A. N. S. P. 



Achatinella minuscula Pfr. , Thwing, Reprint Orig. Descript. 

 Achat., 1907, pi. 3, f. 8. ? Achatinella minuscula Pfr., BALD- 

 WIN, Catalogue p. 6, 1893. Not A. minuscula Pfr. 



"Not common anywhere, but a widely distributed species. 

 It is undoubtedly the Part, minuscula Pfr. of Baldwin's Cata- 

 logue' (Thaanum'). 



It differs from P. zebrina Pfr. and fulgurans Sykes by the 

 much more slender conic spire, which resembles that of P. 

 helena. 



This is a polymorphic species in which several mutations 

 have been established in the same colony. The original pattern 

 was probably zigzag-striped, the derivatives differing by the 

 development of white zones and coalescence of the interrupted 

 stripes in a spiral direction. Figs. 12 to 15 represent shells 

 from the type locality, 12 and 14 being the prevalent color- 

 forms. 



Shells from Honokowai (pi. 14, fig. 8) are snow-white above 

 the periphery, yellow below it, the periphery marked by a band 

 of chestnut spots. There is also a very narrow dark crescent 

 behind the columella and some indistinct dark streaks and 

 spiral lines on the base. Length 14.5, diam. 8.8 mm. I have 

 not seen specimens from the other localities given by Mr. 

 Thaanum. 



This species is named in honor of Mr. D. B. Kuhns, to whose 

 ability in the field we owe many new and interesting Achatinel- 



Section PARTULINA (restricted). 



Larger, more capacious shells than the Perdicdlce, and having 

 the columellar fold well calloused, and the outer lip usually 

 well expanded, thickened within. Sculpture and color-patterns 

 about the same. They live on Molokai (species no. 8 to 15), 

 Lanai (species no. 16), and Maui (species 17 to 35). 



