i62 Original Descriptions of Achati^iella. 



285. Achatinella heliciformis Aucey. 



Aniaslra helicifotmis Anc. Bui. Soc. Malac. France, vii, 1890, p. 340. 



Testa heliciformis, depressa, late umbilicata (umbilicus apertus, pro- 

 fundus, angulo circumdatus, circa 2 millim., saltern adaequans), baud nitida, 

 fusca, rvigoso-striatula, solidula. vSpira depressa, latissime conica, obtusi- 

 uscula. Anfracttis 5, regulariter crescentes, convexitisculi, sutvira impressa, 

 ultimus carinatus, supra convexo-declivis, infra convexus, antice longi- 

 uscule vixque deflexus. Aperttira obliqua, lamina columcllari acuta, vol- 

 vente simplicique armata, emarginata, irregulariter circularis, extus angulata, 

 basi rotundata ; marginibus remotis, columellari recto-declivi cum basali 

 angulum efformans. Diam. maj. 10, min. 9; alt. 6; alt. ap. 3 1-2 millim. 



Shell lieliciform, depressed, broadly umbilicate (umbilicus 

 open, deep, angled at the margin, at least equal to about 2 mm.) 

 not glossy, brown, roughly striatulate, somewhat solid; spire de- 

 pressed, very broadly conic, somewhat obtuse, whorls 5, regularlj^ 

 increasing, slightly convex, with an impressed suture; the last cari- 

 nate, convexly sloping above, convex below, descending gradually 

 and for a distance in front; aperture oblique, furnished with an 

 acute, revolving and simple columellar fold, emarginate, irregu- 

 larly circular, angulate without, rotundate at the base; margins 

 remote, columellar margin straight-sloping, forming an angle with 

 the basal margin. 



Hab. Waianae. — Bald. 



2. Shells front Molokai. 



286. Achatinella nubilosa Mighels. 



A. lutbilosa Migh. Proc. Bost. .Soc, ii, 1S45, p. 20. 



Shell dextral, ovate, conic, thin, variously mottled with dark 

 brown on a light ground, imperforate; whorls 6, convex; aperture 

 semicircular; lip simple, acute. L,ength 7-10, diam. 2-5 in. 



Dr. Mighels gives the locality of his species as Oahu, but the 

 shell known today as A. 7iubilosa Migh. is found only on Molokai. 

 Reeve's description of the species CIcon. Conch. Achat., lyondon, 

 1850, sp. i) is as follows : Shell ovately oblong, dextral, whorls 

 rounded, longitudinally plicately striated, slightly crenulated at 

 the sutures, columella furnished with a single compressed mar- 

 ginal plait ; of a flesh-tinged straw color, irregularly striated and 

 reticulated with blackish olive flames, interior of the aperture 

 whitish. 



Animal tessellated black and gray (when in motion) , tentacles 

 deep black, bottom of foot and mantle dark bro^vn. — Newc. 



Hab. Kalae.— Bald. 



