ACHATINELLA VITTATA. 289 



might be ranked as a subspecies were it not intimately as- 

 sociated with cestus in some Waialae and WaiVupe lots. A 

 division of these would scarcely be natural or practicable. 

 The original description follows. 



Achatinella forbesiana Pfr. (pi. 30, fig. 16, reproduced from. 

 Pfeiffer). Shell dextral or sinistral, subperf orate, ovate- 

 conic, solid, closely striatulate, glossy, gray or whitish, painted 

 with close gray or brown bands, frequently confluent. Spire 

 exactly conic, white above, the tip of the apex black, rather 

 acute. Suture margined ; whorls 6, a little convex, the last a 

 little shorter than the spire, rounded. Aperture oblique, ob- 

 aurif orm ; columella fold high, strong, nodule-like ; peristome 

 bordered with brownish or flesh color, the outer margin nar- 

 rowly expanded, columellar margin thick, subadnate. Length 

 19, diam. 10.5, aperture 10 X 5 mm. Sandwich Islands, Frick, 

 in Cuming coll. (Pfr.). 



33. A. VITTATA Reeve. PL 57, figs. 1 to 5&. 



''Shell dextral, globosely conical, rather ventricose; whorls 

 broadly marginated round the upper part; columella callous, 

 scarcely toothed; lip rather thickened; white, encircled with 

 lines and fillets of pale brown, black at the apex. Sandwich 

 Islands, Mus. Cuming. 



"This approaches so closely to the sinistral species A. decora 

 [=simulans] that it might readily be taken for a dextral 

 variety. The whorls are more rounded and more distinctly 

 margined beneath the sutures. The painting is very similar, 

 but mostly darker next the sutures' (Reeve). 



Oahu : Eastern ridge of Nuuanu valley ; varieties westward 

 to Kalihi. 



Achatinella vittata REEVE, Conch. Icon, vi, pi. 2, f. 9, April, 

 1850. SYKES, Fauna Hawaiiensis, p. 304; with var. cinerea 

 Sykes, p. 305 (1900). NEWCOMB, Ann. Lye. N. H. of N. Y. 

 vi, p. 315. Helix decora Ferussac, in Freycinet's Voy. 

 Uranie et Physicienne, Zoologie, p. 478, 1824. Not H. decora 

 Fer. 1821. Achatina decora Fer., DESHAYES, Histoire Nat., 

 Moll., ii, pt. 2, p. 191, pi. 155, f. 5, 7. Achatinella globosa 

 PFR., P. Z. S. 1855, p. 7, pi. 30, f . 25 ; Monogr. Hel. Viv. iv, 

 542. Cf. Thwing, 1. c., p. 18. 



