I04 Oriojnal Descriptions of Achaiiiiella . 



VARIABILLS GROUP. 

 y 164. Achatinella variabilis Newcomb. 



A. variabilis Newc. P. Zool. Soc. London, 1S5,:;, p. 154, pi. xxiv, fifj. 70. 



vSliell siuistral or dextral, conically acuminate, polished, shin- 

 ing ; whorls 6, rounded, lightly margined above ; aperture round- 

 ly ovate ; columella short, armed with a strong tubercle of a rose- 

 ate colour; lip expanded, acute; colour of shell white, yellow, black 

 and other shades, plain or with from one to six bands of various 

 colours on the last whorl. Long. 14/20, lat. 8/20 poll. 



This is the most variable species in markings that has yet been 

 found among the Achatinellae. It is extremely difficult to find two 

 (except the plain ones) precisel}- alike in this respect. — Newc. 



Hal). Above Waiapaa. — Perkins. 

 ' 165. Achatinella semicarinata Newcomb. 



.-1. st'yiiiiiii nnihi Xewc. 1'. /,nol. Soc. London, i^^.?. p. i,=,6. pi. xxiv, fig. 76. 



Shell dextrorsal, solid, ovately conical, longitudinally sub- 

 striated ; whorls 5, flattened, marginate above the last, angulated 

 in the middle and semicarinated ; aperture ovate ; columella end- 

 ing in a tortuous, obtuse, dentiform plait ; outer lip anteriorly 

 produced, strongly- marginate within ; colour pale yellow ; aperture 

 white internally. 



A straw-coloured conical species, with the last whorl partially 

 surrounded with an elevated keel.— Newc. 



Hab. Lanaihale. 



166. Achatinella lactea Gulick. 



A. hutra Gk. .\nn. Lye. New York, vi, 1836, p. 19.S, pi. iv, fig. 27. 



Shell siuistral, perforate, acuminately ovate, solid, shining, 

 finely striated, and microscopically very finel}' decussated, color 

 ivory white ; apex acute ; spire conical, with outlines slightly con- 

 vex ; suture marginate, slightly impressed; whorls 6 1-2, flatly 

 convex ; columellar fold central, brown, strong ; aperture oblique, 

 sinuately oval, reddish brown within ; peristome white, thickened 

 within ; with external margin arcuate, slightly reflected anteriorly; 

 columellar margin dilated, slightl}' detached ; parietal margin thin. 



Length 0.S6 in. (22 mill.), breadth 0.45 in. ( i \ 2-5 mill.). 



Length of body whorl 0.59 in. ( 15 mill. ). 



Weight 8.00 grains. 



Remarks. A rare shell allied to A . variabilis Newc, but well 

 chara(5feri/.ed as a distinct species. — Gk. 



Hab. Above Waiapaa. — Perkins. ^ 



