l6 Oii_i>inal Descriptions of Achaiinclla. 



DECORA GROUP. 

 7. Achatinella decora Ferussac. 



Arlialiiia ilccdia Ktr. I'crussac &. Deshayes, Hist. Nat. Moll., p. 191, pi. civ. fig.s. 5, 6, 7. 



A. testa .sini.strorsa, globoso-aciiminata, soHda, albida, fasciis briinnei.s 

 cincta; anfractibu.s 5 1-2, superioribu.s planis, et viltimis convexis ; sutiira 

 inarginata ; cohmiella siiperne valide dentata ; apertura obverse auriformi ; 

 peristomate incrassato, intus violaceo-labiato. Long. 20, lat. 14 mill. 



Shell siui.stral, globosely acuminate, solid, whitish, encircled 

 with brown bands; whorls 51-2, the upper flat, the last convex; 

 suture margined ; columella strongly dentate above ; aperture ob- 

 versely auriform ; lip thickened, violet-margined within. 



Animal longer than the shell ; of a light gamboge yellow, with 

 slate-colored tentacles and tentactilar sheath, posteriorly and supe- 

 riorly slightly sprinkled with slate ; mantle of a bluish yellow. 

 — Newc. 



Hab. Nuuanu and Kalihi. 



The type shells contained one A. decora and one A. perversa 

 Swain., two distinct species, which fact has caused much con- 

 ftision in placing these shells. 



8. Achatinella vittata Reeve. 



A. viltata Rve. Rve. Conch. Icon. Achat. I,ondon, 1850; .sp. g. 



Shell dextral, globosely conical, rather ventricose, whorls 

 rather broadly marginated round the upper part, columella callous, 

 .scarcely toothed, lip rather thickened ; white, encircled with lines 

 and fillets of pale brown, black at the apex. 



This species is met with in Nuttanu Valley, some three miles 

 from Honolttlu. The inflated variety designated as A.globosa by 

 Dr. Pfeifler, is not tmcommon. The typical specimen of this 

 species in the Cumingian colledlion is more elongated than is com- 

 mon, but is entirely satisfa(5lory in establishing in my mind the 

 claims of this species. — Newc. 



A dextral form of A. decora Fer. — Bald. 



Hab. Patioa Ridge. 



9. Achatinella simulans Reeve. 



.(. iiDiiihim Rve. Rve. Coiicli. Icon. .^chat. I.omloti, iS^o; sp. 15. 



Shell globosely conical, sinistral, sharp towards the apex, 

 whorls conspicuotisly margined at the sutures, columella short, 

 flatly callous; white, encircled with a very few light brown lines, 



