i62 Original Descriptiojis of Achatinella. 



285. Achatinella heliciformis Ancey. 



AiiiUitra lu'liciformis Auc. liul. Soc. JIalac. France, vii, 1890, p. 340. 



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

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

 fusca, rugoso-striatula, solidula. Spira depressa, latissime couica, obtusi- 

 uscula. Anfractus 5, regulariter crescentes, convexiusculi, sutura impressa, 

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

 uscule vixque deflexus. Apertura obliqua, lamina columellari 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 heliciforni, depressed, broadly umbilicate (umbilicus 

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

 not glossy, brown, roughl}' striatulate, somewhat solid; spire de- 

 pressed, very broadly conic, somewhat obtuse, whorls 5, regularly 

 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. 



Shells from Molokai. 



286. Achatinella nubilosa Mighels. 



A. nitbilosa 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. lyeugth 7-10, diam. 2-5 in. 



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

 shell known toda}- as A. nubilosa Migh. is found only on Molokai. 

 Reeve's description of the species ficon. Conch. Achat., London, 

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

 rounded, longitudinally plicately striated, slightl}' crenulated at 

 the sutures, columella furnLshed with a single compressed mar- 

 ginal plait ; of a flesh-tinged straw color, irregularl}- 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 brown. — Newc. 



Hab. Kalae.— Bald. 



