ACHATINELLA PULGENS. 191 



Achatinella fulgens NEWC., Proc. Zool. Soc. London, 1853, 

 p. 131; varieties figured on pi. 22, f. 24, 24a. PFR., Mono- 

 graphia, iv, p. 537. Achatinella liliacea PFEIFFER, P. Z. S., 

 1859, p. 31; Monographia, vi, p. 173. A. lilaceum Pfr., 

 HARTMAN, Proc. A. N. S., Phila., 1888, p. 34. Achatinella 

 vulpina Fer., REEVE, Conch. Icon,, vi, pi. 4, f. 290, &, c. 

 THWING, Orig. Descriptions, etc., pi. 1, f. 12. Not of Ferus- 

 sac. Achatinella crassidentata PFR., P. Z. S. 1855, p. 6, pi. 

 30, f. 23; Monographia, iv, p. 539. Achatinella plumata Gu- 

 lick, Annals of the Lyceum of Natural History of New York, 

 vi, p. 217, pi. 7, f . 41, December, 1856 ; Evolution, etc., p. 41, 

 pi. 2, f. 23 (Waialae). Achatinella diversa GULICK, t. c. p., 

 220, pi. 7, f. 42a, 42&; Evolution, etc., p. 41, pi. 2, f. 24 (Wai- 

 alae). THWING, Orig. Descript., pi. 1, f. 11. Achatinella 

 varia GULICK, t. c. p. 222, pi. 7, f. 43 ; Evolution, Racial and 

 Habitudinal, p. 41, pi. 2, f. 21 (Palolo). Achatinella tri- 

 lineata GULICK, t. c., p. 226, pi. 7, f. 43; Evolution, etc., p. 

 41, pi. 2, f. 20 (Palolo). Achatinella augusta SMITH, P. Z. 

 S., 1873, p. 74, pi. 9, f. 7. Achatinella angusta Sm., PAETEL, 

 Catalog, p. 105. HARTMAN, Proc. A. N. S. Phila., 1888, p. 

 33. 



A. fulgens comprises particolored, sinistral shells, inhabit- 

 ing the ridges and ravines between the areas of A. phceozona 

 on the east, and A. stewartii on the west. It is ordinarily a 

 more slender shell than A. phaozona, with the spire nearly 

 straight-sided, and further differs from that by the frequent 

 presence of a yellow or green cuticle. A. stewartii is usually 

 more solid, more obtuse above, and differs in color-patterns. 

 It never has white bands, which are frequent in fulgens. 

 A. fulgens is sinistral as a rule, but dextral as a very rare 

 variation. Probably about half a dozen dextral shells are 

 known. The Kailua race, versipellis, is frequently dextral. 

 There are some transitional examples on the boundaries be- 

 tween phceozona, fulgens, and stewartii, where narrow areas 

 of overlap exist on the western and northern confines of Kuli- 

 ouou, and in the northwestern ravines of Palolo. 



Many strikingly diverse color-mutations have arisen and 

 become more or less generally spread throughout the fulgens 



