12 



ravines of the mountainous districts around Lahania, W. Mani. The 

 perdix is arboreal, and the 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 OVttttt, 



conica ; anfractibus 6, rotundis, ultimo superne marginato ; sutura 

 bene impressa ; apertura subquadrata ; labro expanse, subreflexo, 

 valde incrassato interne ; columella brevi, in plicam robustam 

 contortam terminante ; colore substramineo pallide, olivaceo vel 

 fusco, labro albo vel subroseo. 

 Long, g; lat. I poll. 

 Hob. 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 (PI. XXII. fig. 22, 22 a). A. testa dex- 

 trorsa, conica, fulgente; anfractibus 6, rotundis, supra marginatis ; 

 sutura bene impressa; labro expanse, versus marginemferrugineo et 

 incrassato; columella albida, brevi, plicata et cum callo forti supra 

 umbilicum expanse ; apertura subrhomboidali ; striis numerosis 

 longitudinalibus et in anfractu ultimo rugosis ; colore epidermatis 

 prasino interdum umbrosi instar pallidi vel fusel, coloribus simul 

 cum striis alternantibus cum vel sine vittis transversis subviri- 

 dibus. 



Long. jj s lat. i poll. 



Hob. 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 ; striae 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 striae, with or without pale 

 green transverse lines. 



^ 24. ACHATINELLA MULTILINEATA (PI. XXII. fig. 23). A. testa 

 dextrorsa vel sinistrorsa, solida conico-elongata ; anfractibus 6, ro- 

 tundis, supra marginatis ; labro infra expanse et subreflexo, supra 

 acute et interne adaucto ; columella brevi robusta, subplicata cum 

 callo umbilicum obtegente et pcene claudente ; apertura oblong o- 

 ovata ; colore columella, labri et suturte albo interdum Jlavide in- 

 terstincto; testa alba, cum vel sine numerosis fasciis et lineis trans- 

 versisferruginaceis. 



Long. 2. kt. g poll. 



Hab. Kolaupoco, Oahu. 



Shell dextral or sinistral, solid, elongately conical, whorls 6, 

 rounded, margined above ; lip expanded below and slightly subre- 



