82 Original Descriptions of Achatinella. 



120. Achatinella nivosa Newcomb. 



A. nivosa Newc. P. Zool. Soc. London, 1853, p. 132, pi. xxii, fig. 6. 



Shell dextral, conical; whorls 6, rounded, margined above; 

 suture moderate ; aperture subovate ; columella short, twisted into 

 a flexuous plate inferiorly ; lip simple ; apex of shell obtuse ; colour 

 above brownish, below pure white, ornamented with beautiful 

 longitudinal green or brownish interrupted stripes, with or without 

 one or more pink colored or brown transverse bands ; columella 

 piuk or white. Long. 14/20, lat. 8/20 poll. 



This beautiful species belongs to the same group with A. ab- 

 brcviata and A, bacca. 



Hab. Niu. — Newc. 



This description is given here, although Dr. Newcomb after- 

 wards admitted it to be only a manufactured variety from A. ab- 

 breviates Rve. 



121. Achatinella bacca Reeve. 



A, bacca Rve. Rve. Conch. Icon. Achat., London, 1S50, sp. 45. 



Shell abbreviately conical, dextral, rather veutricose, whorls 

 convex, margined round the upper part, columella plicately twisted; 

 very dark chestnut, sutures yellowish, columella pinkish. 



Animal of a greenish slate above, tentacles and sheath dark 

 brown, mantle yellowish green; length, when extended, equal to 

 the shell. — Newc. 



Hab. Palolo. 



This is the dark, sometimes almost black variety of A. ab- 

 brcviata Rve. 



SOWERBYANA GROUP. 

 122. Achatinella sowerbyana Pfeiffer. 



A. sowerbyana Pfr. P. Zool. Soc. London, 1855, p. 4, pi. xxx, fig 14. 



A. testa sinistrorsa, imperforata, conico-oblonga, solidula, subkevigata, 

 glutinoso-nitente, fulvo-lutescente, saturatius subradiata ; spira convexius- 

 culo-conica, subacuta ; sutura marginata ; anfr. 6, vix convexiusculis, ultimo 

 spira paulo breviore, basi saccato-rotundato ; apertura obliqua, obauriformi, 

 intus alba; plica columellari supera, valida, torta, rosea; perist. roseo- 

 labiato, margine externo breviter expanse columellari dilatato, adnato. 

 Long. 18, diam. 9 mill. 



B. Paulo minor, flavo-albida, basi castanea vel viridula. 



