ACHATINELLA VITTATA. 291 



taken by these collectors of sixty years ago are both dextral 

 and sinistral. Those taken by Mr. Thwing and Dr. Cooke 

 ten to twenty years ago, presumably from further up the val- 

 ley, are exclusively sinistral. 



Judging from the short specimens approaching globosa 

 among A. vittata from Newcomb, and his remark upon the 

 form, I presume that this supposed species was based upon a 

 selected extreme form, probably from the vittata colony of 

 southeastern Nuuanu and is not in any proper sense a variety 

 or race. Mr. Sykes considered the type of globom to be 

 vittata, and Mr. Thwing has taken the same view. The origi- 

 nal description of A. globosa follows. 



il A. globosa Pfr. [pi. 30, fig. 25, photographic copy of ori- 

 ginal figure]. Shell subimperf orate, dextral, conic-globose, 

 rather thin, striatulate, white, encircled with brown lines; 

 spire short, a little convexly conic, subacute ; suture lightly 

 impressed, somewhat marginate ; whorls 5, moderately convex, 

 the last one obese, about as long as the spire, brown at the 

 base ; aperture oblique, subtetragonal-oval, pearly within ; 

 columellar fold weak, slightly twisted ; peristome acute, brown- 

 edged, somewhat white-lipped within ; columellar margin 

 thickened, somewhat adnate. Length 17, diam. 11% mm. ; 

 aperture 10 mm. long, 6 wide. Mus. Cuming. Sandwich 

 Islands, Frick' (Pfr.). 



33a. A. vittata cinerea Sykes. PL 57, figs. 6, 6#, 6Z>, 7. 



Banding almost black on the last whorl, ash colored on the 

 whorl above, the upper whorls tinted with pale-brown banding 

 above the suture, replaced by an almost black line at the apex. 

 Nuuanu, Perkins (Sykes). 



In a series collected by Dr. Cooke (pi. 57, figs. 6 to 7) on a 

 few ridges of the eastern side of Nuuanu just above the dam, 

 the penult, and upper part of last whorl are tea green or 

 glaucous-gray, narrowly streaked with whitish, the last whorl 

 traversed by blackish-chestnut lines which increase and be- 

 come confluent near the lip ; a band bordering the suture and 

 usually a subperipheral band are white ; columellar margin 

 cinnamon brown. 28 specimens before me are all sinistral. 

 It occurs as a pure race, varying chiefly in the earlier or later 



