137 
sato; columella brevi, plana et oblique truncata; colore epider- 
midis subvirente, colore pallidiore ad longitudinem intersperso, 
columella, labri et aperture albo. 
Long. >; lat. £ poll. 
Hab. Niu, Oahu. 
Shell conically ovate; whorls 6, rounded and margined above ; 
suture distinct and lined with white; aperture ovate, expanding be- 
low ; lip thickened; columella short, flat and obliquely truncated ; 
colour of epidermis light green, interspersed with a lighter shade 
arranged longitudinally ; columella, lip and aperture white. 
Var. a. Pure white. 
Var. 8. Brown or chestnut replacing the green colour. 
Through var. a this species approaches a variety of 4. rutila, and 
through var. 6, 4. decipiens. It is readily distinguished from the 
first by its smaller size, greater solidity, stronger strize and more 
elongate form ; from the latter by its less acuminate form, white su- 
ture, less solidity, and their widely-separated localities. 
20. ACHATINELLA AMPLA (PI. XXII. fig. 19). A. testa deztrorsa, 
conico-ovata, polita; anfractibus 5, rotundis; sutura simplici, 
vitta nigra fasciolata; apertura magna, albida; labro externo 
simplici, acuto, interne incrassato ; columella brevi, alba vel ro- 
sea; epidermide supra subviridi vel olivacea, in anfractu ultimo 
subfusca. 
Long. ani lat. > poll. 
Hab. Kolau, Oahu. 
Shell dextral, conically ovate, polished ; whorls 5, rounded ; su- 
ture simple, banded with a black stripe ; aperture large and white ; 
outer lip simple, acute, thickened within ; columella short, white or 
roseate, terminating in a twisted plait; apex obtuse, roseate; epi- 
dermis light green or olive above, of a deeper colour on the last 
whorl. 
21. AcnatTineLLa Apamstt (PI. XXII. fig. 20). A. testa dew- 
trorsa, conico-acuminata; anfractibus 6, cum striis transversalibus 
exiguis, longitudinalibus fortibus ; sutura valde depressa ; labro 
expanso ; columella in plicam solidam, abrupte tortam desinente ; 
teste lamina interna coloris plumbei, externa obscuri castanet, 
irregulariter albido punctata et striata. 
Long. 3 lat. s poll. 
Hab. E. Mani, at the root of ferns. 
Shell dextral, conically acuminate, whorls 6, finely striated trans- 
versely, roughly striated longitudinally ; suture deeply impressed ; lip 
expanded ; columella terminating in a strong abruptly twisted plait ; 
interior of shell of a leaden blue colour, exterior dark chestnut, irre- 
gularly mottled and striped with white. 
This species makes the nearest approach in form to A. perdix of 
Reeve, an immature specimen of which is figured in his Monograph, 
fig. 43. The locality of this latter species is the almost inaccessible 
