138 
ravines of the mountainous districts around Lahania, W. Mani. The 
A. perdiz is arboreal, and the 4. Adamsii terrestrial in its habits. 
The species is dedicated to Professor C. B. Adams, of Amherst 
College, Mass. 
22. ACHATINELLA RUTILA (Pl. XXII. fig. 21). A. testa ovata, 
conica ; anfractibus 6, rotundis, ultimo superne marginato ; sutura 
bene impressa; apertura subquadrata ; labro expanso, subreflexo, 
interne valde incrassato; columella brevi, in plicam robustam, 
contortam terminante ; colore substramineo pallido, olivaceo vel 
Susco ; labro albo vel subroseo. 
Long. pe lat. 2 poll. 
Hab. Niu, Oahu. 
Shell ovately conic ; whorls 6, rounded, the last margined above ; 
suture well-marked; aperture subquadrate; lip expanded, subre- 
flected, strongly thickened within ; columella short, terminating in a 
strong twisted plait ; colour a light straw, olive or brown. 
23. ACHATINELLA RUGOSA (Pl. XXII. fig. 22, 22a). A. testa dex- 
trorsa, conica, fulgente; anfractibus 6, rotundis, supra marginatis ; 
sutura bene impressa; labro expanso, versus marginem ferrugineo 
et incrassato ; columella albida, brevi, plicata, callo forti supra 
umbilicum eapanso ; apertura subrhomboidali ; striis numerosis lon- 
gitudinalibus et in anfractu ultimo rugosis ; colore epidermidis pra- 
sino interdum umbrosi instar pallidi vel fusci, coloribus simul cum 
striis alternantibus cum vel sine vittis transversis subviridibus. 
Long. a lat. - poll. 
Hab. Ewa, Oahu. 
Shell dextral, conical, glossy ; whorls 6, rounded, margined above ; 
suture well-impressed ; lip expanded, of a reddish brown at the mar- 
gin, thickened near the edge; columella white, short, twisted, and 
with a strong callus spread over the umbilicus; aperture subrhom- 
boidal ; strize longitudinal, numerous, and on the last whorl rugose ; 
colour of epidermis of a deep green, a light or dark umber, some- 
times alternating and arranged with the strize, with or without pale 
green transverse lines. 
24. ACHATINELLA MULTILINEATA (Pl. XXII. fig. 23). A. testa 
dextrorsa vel sinistrorsa, solida, conico-elongata; anfractibus 6, ro- 
tundis, supra marginatis ; labro infra eapanso et subreflexo, supra 
acuto et interne adaucto ; columella brevi robusta, subplicata cum 
callo umbilicum obtegente et pane claudente ; apertura oblongo- 
ovata ; colore columella, labri et suture albo, interdum flavido in- 
terstincto; testa alba, cum vel sine Fasciis et lineis numerosis trans- 
versis, ferrugineis. 
Long. s; lat. x poll. 
Hab. Kolau poco, Oahu. 
Shell dextral or sinistral, solid, elongately conical, whorls 6, 
rounded, margined above ; lip expanded below and slightly subre- 
