82 Original Descriptions of Achatinclla. 



I20. Achatinella nivosa Newcomb. 



A. vivosa 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 piuk colored or brown transverse bands ; columella 

 pink 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 nianufa(5tured variety from A. ab- 

 breviata Rve. 



y 121. Achatinella bacca Reeve. 



A. hacca Rve. Rve. Conch. Icon. Achat., London, 1850, .sp. 45. 



Shell abbreviately conical, dextral, rather ventricose, 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. soivnhyana Pfr. P. ZooL Soc. London, iSss, p. 4, pi. xx.x, 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 convexiiisculis, ultimo 

 spira paulo breviore, basi .saccato-rotiiudato ; apertura obliqua, obauriformi, 

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

 labiato, margine externo breviter expanse, columellari dilatato, adnato. 

 Long. 18, diam. 9 mill. 



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



