Original Descriptions of Achatinella. 59 



tributed over nearly the whole range of the species ; only five 

 specimens were found below sub-ridge XIV. 



"The sixth group is made up of the color-varieties V-Y. The 

 shells are variously colored from a rich mahogany brown to a pink- 

 ish purple. The apex is usually banded ; in some cases it is white. 

 The columella is usually purple. All except two specimens came 

 from sub-ridges XV-XVII ; 75 per cent, were found upon lehua. 

 This group comes nearest, in color, to A. bclhila Sm., but differs 

 in form and size from that species. 



"The seventh group is made up of the color-variety Z. This 

 color-varietj' agrees with several of the other color-varieties in the 

 markings of the lower whorls, but differs from them in the verj^ 

 dark banded apex. Of this group 96 per cent, were found on sub- 

 ridges I and II ; 70 per cent, were found on guava, and 23 per 

 cent, on lehua." 



COLORATA GROUP. 

 74. Achatinella colorata Reeve. 



A. colorata Rve. Conch. Icon. Achat., London, 1850, sp. 18. 



Shell oblong-conical, dextral, whorls flatly convex, columella 

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

 broad green band, sutures black-brown, columella light pink. 



Hab. Ahuimanu. — Hartman. Kalihi. — Bald. 



This and the following nine species may be well grouped 

 together as the colorata group. All are found in the valleys be- 

 tween Nuuanu and Halawa. 



75. Achatinella ampla Newc. 



A. ampla Newc. P. Zool. .Soc. London, i.S,s3, p. 137, pi. xxii, fig. 19. 



Shell dextral, conically-ovate, polished ; whorls 5, rounded; 

 suture simple, banded with a black stripe ; aperture large and 

 white ; outer lip simple, acute, thickened within ; columella short, 

 white or roseate, terminating in a twi.sted plait ; apex obtuse, 

 roseate ; epidermis light green or olive above, of a deeper colour 

 on the last whorl. Long. 14/20, lat. 10/20 poll. 



Hab. Koolau. — Newc. 



Baldwin calls this a large variety of A. colorata Rve. It looks 

 to me very much like A. adusta Rve., but both colorata and adusta 

 are sinistral, while this is dextral. 



