136 
armed with a twisted plicate tooth ; lip simple; colour of shell from 
roseate to sanguineous, thickly covered with black lineations, form- 
ing chain-work and zigzag markings on the three lower whorls; de- 
nuded of epidermis above ; apex mammillate and black. 
17, ACHATINELLA porPHyREA (PI. XXII. fig. 16). 4. testa so- 
lidiuscula, acuminato-conica ; anfractibus 7, superne subcarinatis, 
non marginatis, plano-convexis ; sutura valde impressa ; apertura 
subovata, infra contracta; labro tenui; columella brevi, in pli- 
cam contortam terminante ; epidermide tenui et nigra; striis lon- 
gitudinalibus, fortibus ; colore sub epidermide plumbeo, lineis nu- 
merosis fuscis, transversis testam circumambientibus. 
Long. x3 lat. x poll. 
Hab. Waianoe, Oahu. 
Shell rather solid, acuminately conical; whorls 7, subcarinated 
above, plano-convex ; suture deeply impressed ; aperture subovate, 
contracted below ; lip thin; columella short, terminating in a twisted 
plait ;_ epidermis thin and black ; strize longitudinal and strong ; 
colour beneath epidermis of a leaden hue, with numerous transverse 
brown lines encircling the shell. 
This species belongs to the same group with 4. spirizona, Fér., 
A. cylindrica and A. intermedia, Nob., but which are quite distinct 
in specific characters. They are all terrestrial, not arboreal spe- 
cies. 
18. ACHATINELLA GIGANTEA (Pl. XXII. fig. 17). A. testa dex- 
trorsa, elongato-ovata, apice acuminato ; anfractibus 7, fortiter 
striatis, anfractu ultimo superne, penultimo inferne subcarinato ; 
apertura ovali ; columella subarcuata, interne in levem callum ter- 
minante, externe continuata, cum labro externo juncta ; labro in- 
terno callo crasso, striato; labro externo plano; sutura pro- 
Sunda ; striis longitudinalibus ; colore externe subplumbeo et in- 
terne sublilaceo. 
Long. 13; lat. 5 poll. 
Hab. Hale a Ka la, Mani. 
Shell dextral, elongate-ovate, apex pointed; whorls 7, strongly 
striate, slightly carinated superiorly on the last whorl, inferiorly on 
the penultimate ; columella slightly arched, terminating internally in 
a slight callosity, externally continued to unite with the outer lip ; 
columellar lip with a strong deposit spread over its surface; outer 
lip simple ; suture deep ; striz longitudinal ; colour light plumbeous 
externally, internally pale lilac. 
This species, the largest yet described, belongs to the same group 
with 4. violacea, from Molokai, and A. Baldwinii, from Ranai, all 
of which are described in this communication. 
19. ACHATINELLA suBVIRENS (Pl. XXII. fig. 18). A. testa co- 
nico-ovata ; anfractibus 6, rotundis et superne marginatis ; sutura 
distincta, albida ; apertura ovata, infra expansa; labro incras-. 
