30 Original Descriptio?is of Achatinella. 



margined; whorls 6, hardly convex, the last a little shorter than 

 the spire, rounded at the base ; aperture slightly oblique, trunc- 

 ately auriform ; columellar fold twisted, strong, tooth-like ; peris- 

 tome thickly white-lipped, right margin constricted, expanded a 

 little, thickened at the columella, adnate. 



Hab. Helemano. 



This seems to be only another form of A. swiftii Newc. 



33. Achatinella lilacea Gulick. 



Apex lilaceus Gk. P. Zool. Soc. London, 1873, p. 79, pi. x, fig. 4. 



Testa dextrorsa, globosa-conica, nitida, incrementi lineis (haud spirali- 

 bus) striata, lilaceo-cervina, albida strigata ; sutura dilute marginata ; an- 

 fract. 6, primi 3 subplani, albi, caeteri convexi ; anfract. ult. medio interdum 

 obscure obtusatim angulatus ; apertura albida ; perist. dilute roseo-fuscum, 

 paululum dilataturn, intus incrassatum ; plica columellaris valida, pallide 

 rosea. Long. 21, diam. 12 1-2 mill. 



Shell dextral, globosely conical, shining, striated with lines of 

 growth (not spiral), lilac-fawn, whitish striped; suture lightly 

 margined ; whorls 6, first three nearly flat, white, the others con- 

 vex ; the last whorl sometimes obscurely obtusely angled at the 

 middle ; aperture whitish ; lip pale rose-brown, very slightly ex- 

 panded, thickened within ; columellar fold strong, pale rose. 



Affinities. It is readily distinguished from A. apicahis Newc. 

 by the color of the apex, which is chestnut in that species, but 

 white in this. Sinistral specimens are very rare. — Gk. 



Hab. The metropolis of the species is Ahonui, on Oahu. 

 It is also abundant in Kalaikoa, but becomes very rare in Wahiawa, 

 Helemano and Kawailoa. 



34. Achatinella vespertina Baldwin. 



A. vespertina Bald. P. Ac. Phil., 1895, p. 219, pi. x, fig. 14. 



Shell dextral, minutely perforated, solid, globose, with the spire 

 conical, lateral outlines slightly concave, apex subacute ; surface 

 shining? striated with delicate growth lines ; apical whorls smooth. 

 Of a uniform delicate cream color, lighter on the upper whorls and 

 sutures ; sometimes with a few faint, white transverse lines on the 

 lower whorl. Whorls 6, narrowly margined above, the first three 

 plain, the rest slightly convex, the last somewhat inflated; suture 

 lightly impressed. Aperture very oblique, oval, white within ; 

 peristome white, acute, thickened within, somewhat expanded, the 

 basal margin slightly reflected, the columellar margin forming a 

 sinuous ridge around the umbilicus, extremities united by a very 

 thin callosity ; columella terminating in a strong, round, white 

 tubercle. Length 21, diam. 14 1-2 mill. 



