10 



Shell acuminately oblong ; whorls 7, convex below, plano-convex 

 above ; suture distinctly marked ; aperture subovate ; columella 

 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). A. testa SO- 



lldiuscula, acuminata conica ; anfractibus 7, superne subcarinatis, 

 non marginatis, plano-convexis ; sutura valde impressa ; apertura 

 subovata, infra contracta ; labrotenui; columella brevi, in pli- 

 cam contortam terminante ; epidermate tenui et nigra ; striis lon- 

 gitudinalibus fortibus ; colore subepidermate plumbeo, cum nume- 

 rosis lineisfuscis transversis testam circumambientibus. 

 Long.^;lat.|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 ; strise 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 A. spirizona, Fer., 

 A. cylindrica and A. intermedia, Nob., but which are quite distinct 

 in specific characters. They are all terrestrial, not arboreal species. 



18. ACHATINELLA GIGANTEA (PI. XXII. fig. 17). A. testadex- 

 trorsa, elongato-ovata, apice acuminato ; anfractibus 7, fortiter 

 striatis, ultimo anfractu superne, penultimo inferne subcarinato ; 

 apertura ovali ; columella subarcuata, interne in levem callum ter- 

 minante, externe continuata, ut jungat cum labro externo ; striato 

 crasso deposito supra superjiciem labri interni ; labro externo 



piano; sutura profunda ; striis longitudinalibus ; colore subplum- 

 beo externe et subliliaceo interne. 



Long, li; lat.i?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, exterior continued to unite with the outer lip ; colu- 

 mellar lip with a strong deposit spread over its surface ; outer lip 

 simple ; suture deep ; strise longitudinal ; colour light plumbeous 

 externally, internally pale lilac. 



This species, the largest yet described, belongs to the same group 

 with A. violacea, from Molokai, and A. Baldwinii, from Ranai, all 

 of which are given in this communication. 



19. ACHATINELLA SUBVIRENS (PI. XXII. fig. 18). A. testa co- 

 nico-ovata; anfractibus 6, rotundis et superne marginatis ; sutura 



