lY. 



Skctiox PARTULINA Pkkifkkr. 



/. Shr/ls fioiu OaJiii. 



148. Achatinella dubia Newcomb. 



./. dnbia Xewc. P. Zool. Soc. London, iS.s.s, p. 152, pi. xxiv, fig. 65. 



vShell dextral or .sinistral, tliiir, conically elongate ; whorls 6, 

 with finely decussating striae ; suture simple ; aperture ovate ; lip 

 expanded, slightly reflected ; columella white, bulimoid except in 

 adult specimens (which exhibit a callus); umbilicus small and 

 perforate ; colour light corneous with radiating zigzag lines and 

 blotches of a light colour. Long. 16/20, lat. 7/20 poll. 



The above shell approaches in its characters very near to the 

 genus Bulimus. It is referred to this genus from its disposition to 

 be either sinistral or dextral ; from its animal being viviparous ; 

 and from old specimens exhibiting a flat, twisted columellar tooth. 

 It forms the terminus of a series of four species herein described ; 

 the others a.veA. hclcna, A. pliysa and A. grisea, all heterostrophe 

 species. — Newc. 



Hab. Waianae. — Newc. 



Dextral examples are much more common than sinistral. 



149. Achatinella morbida Pfeiffer. 



,). (BiiliDirlla) iiuobida Pfr, 1". Zool. Soc. London, i.Ssy, p. ;,o. 



T. sul)]K'rforala, .sini.strorsa, ovato-Uirrila, solidula, .striata ct .strii.s coii- 

 fcTtis .spiralilni.s .sublt-utt decussata, alba, fusco varie strigala ct fasciala ; 

 spira elonj^ala, gracilis, apice acvitiiiscubi ; sutura simplex ; aiifr. 6 1-2 vix 

 convexiusculi, ultinius spira paulo Ijrcvior, conwxus ; plica columcllaris 

 alba, brevis, obliqua ; apertura obli(|ua, o1)auriformis ; perist. incras.satum, 

 breviter cxpansum, margint coluincllari pcnlilalato, late adnato. Long. 19, 

 (liain. 9 mill. 



Shell subperforate, sinistral, ovate-turreted, somewhat solid, 

 striate and under a lens decussate with close spiral striae, white, 

 variously striped and banded with brown ; spire elongate, slender, 



(Of) 



