1 6 Original Descriptions of Achatinclla. 



DECORA GROUP. 

 7. Achatinella decora Ferussac. 



. [chatina decora l-'t-r. Ferussac & Deshayes, Hist. Nat. Moll., p. 191, pi. civ, figs. ,s, 6, 7. 



A. testa sinistrorsa, globoso-acuminata, solida, albida, fasciis brunneis 

 cincta; anfractibus 5 1-2, superioribus planis, et ultimis convexis; sutura 

 marginata ; columella superne valide dentata ; apertura obverse auriformi ; 

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



vShell sinistral, globosely acuminate, solid, whitish, encircled 

 with brown bands*; whorls 5 1-2, 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 tentacular 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- 

 fusion in placing these shells. 



8. Achatinella vittata Reeve. 



./. vittata Rve. Rve. Conch. Icon. Achat. London, 1850; sp. 9. 



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 Nuuanu Valley, some three miles 

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

 Dr. Pfeiffer, is not uncommon. The typical specimen of this 

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

 mon, but is entirely satisfactory in establishing in my mind the 

 claims of this species. — Newc. 



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



Hab. Pauoa Ridge. 



9. Achatinella simulans Reeve. 



. I. simulans Rve. Rve. Conch. Icon. Achat. London, 1850; sp. is. 



Shell globosely conical, sinistral, sharp towards the apex, 

 whorls conspicuously margined at the sutures, columella short, 

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



