ACHATINELLA SOWERBYANA. 175* 



habitat of A. pupukanioe by about a fourth of the length of 

 the island, wherein no similar form has been found. It also 

 resembles A. s. dextroversa, of the northwestern end of the 

 range. A. cast a, in some Waimano lots, resembles pupu- 

 kanioe in coloration, but is more lengthened and sinistral. 

 The resemblance is so 'dose, however, that I would refer tli3 

 new form to casta as a variety, were it not that old specimens 

 (such as pi. 35, fig. 15) have the columellar lip built up to 

 form a ledge, exactly as in Bulimella, and unlike any of the 

 very long series of casta I have seen. 



The apical whorls are rather deeply eroded in all of the 

 adult shells from the type locality. In a young one they are 

 cartridge-buff with a white band above the suture. 



In Mr. W. D. AVilder's collection a series from the 'type 

 locality contains several aberrant individuals : streaked with 

 burnt-sienna on a yellow ground, and others with the same 

 pattern interrupted by broad white zones at suture, periph- 

 ery and base. 



A long series of smaller specimens was taken by Mr. Spali- 

 ing in a very limited area on the southern slope of the peak 

 at the northern head of Waiawa valley. White shells are in 

 the majority, but some have a basal band (iii), and in one 

 before me there are two faint bands (ii and iii), and thy 

 eroded embryonic whorls are brown. Two measure : 



Length 14.3, diam. 8 mm. 



Length 16, diam. 8, aperture 7.7 mm. 



13. A. SOWERBYANA Pfeiffer. PL 30, figs. 14, 14 ; pi. 34, figs. 

 9, 10. 



Shell sinistral, imperforate, conic-oblong, rather solid, 

 smoothish, having a gummy gloss; tawny buff, slightly 

 streaked with a deeper shade. Spire a little convexly-conic, 

 the apex subacute, suture margined. Whorls 6, very slightly 

 convex, the last a little shorter than the spire, rounded sack- 

 like at the base. Aperture oblique, inversely ear-shaped, 

 white within; columellar fold superior, strong, twisted, rose- 

 ate ; peristome rose-lipped, the outer margin shortly expanded, 

 columellar margin dilated, adnate. Length 18, diam. 9 mm. ; 



