224 ACHATINELLA VULPINA. 



virens, similar to those of Halawa and Aeia. This is the ex- 

 treme western limit of the species so far as I know. 



Varieties of A. vulpina from the northern or Koolau side of 

 the mountains. The valleys on this side are very short, formed 

 by short butresses, and heading up in precipices often quite as 

 abrupt as the Nuuanu pali, and mainly higher. The ridge can 

 be attained from the northern side in very few places in this 

 part of the range. The snail colonies, chiefly on the lower, 

 less precipitous slopes where trees find foothold around the 

 valley heads, are therefore in a measure isolated from the for- 

 ests on top and southward. I have seen considerable num- 

 bers of these Koolau snails, but all from collections made by 

 Newcomb and Gulick. The present status of the colonies is 

 not known to me. 



18a. A. VULPINA COLORATA Reeve. PI. 41, figs. 8 to Se. 



"Shell oblong-conical, dextral, whorls flatly convex, colu- 

 mella with a twisted plait, aperture small; yellow, encircled 

 with a very broad green band, sutures black-brown, columella 

 light pink. Sandwich Islands ' ' (Reeve ) . 



The last whorl is apricot yellow or lighter above, ochraceous- 

 orange below a wide girdle of grass green or parrot green, 

 which encircles it above the periphery. Rarely the green band 

 is wanting. Other shells are darkened by a suffusion and 

 streaking of chestnut with or without an olive girdle. The 

 sutural band of deep chestnut is invariable in a large lot be- 

 before us, collected by Gulick. Out of 59 specimens in coll. 

 A. N. S. P., 27 are dextral. 



Length 20, diam. 10.5 ; 6 whorls. 



Length 18, diam. 10.3 mm. 



Length 17, diam. 9 mm. 



Ahuimanu (Gulick) ; a colorata X virens form in Kahaluu 

 (Gulick). 



Achatinella colorata REEVE, Conch. Icon, vi, pi. 3, f. 18, 

 April, 1850. PFR., Monographia iii, 461. Achatinella con- 

 sanguinea SMITH, P. Z. S. 1873, p. 73, pi. 9, f. 3. Achatinella 

 ustulata NEWCOMB MS., according to Pfeiffer, Monogr. vi, p. 

 172, no description. 



