184 Original Descriptions of Achatinella. 



342. Achatinella extincta Pfeiffer. 



A extincta Pfr. P. Zool. Soc. London, 1855, p. 204. 



A. testa perforata, ovato-turrita, solida, striatula, cretacea ; spira elon- 

 gata, sursum attemiata, acuta; anfr. 7 vix convexiusculis, ultimo 1-3 longi- 

 tudinis non attingente, juxta perforationem subcotnpresso; apertura vix ob- 

 liqua, rhombeo-ovali, basi angulata ; plicata colum. compressa, fere a basi 

 ascendente; perist. simplice, recto marginibus callocrasso, subnodifero junc- 

 tis, columellari dilatato, libera. Long. 16, diam. 7 1-2 mill. 



Shell perforate, ovately turreted, solid, somewhat striate, chalky; 

 spire elongate, attenuate above, acute; whorls 7 scarcely convex, 

 the last not reaching 1-3 of the length, subcompressed adjoining the 

 umbilicus; aperture scarcely oblique, rhomboidal-oval, angulate 

 at the base; columellar fold compressed, almost ascending from 

 the base; lip simple, erect, with the margins united by a thick 

 nodiform callus, columellar margin dilated, free. 



Hab. Kauai, Maui and Oahu. — Bald. 



343. Achatinella similaris Pease. 



A. rugulosa Pse., var. similaris. J. Conch., xviii, 1870, p. 96. 



T. subfossilis, latius umbilicata ; plica columellaris parum prominens; 

 apertura ad basin subangulata. 



Shell subfossil, broadly umbilicate ; columellar fold hardly 

 prominent; aperture subangulate at the base. 



Hab. Mana. — Bald. 



344. Achatinella sphserica Pease. 



Amastra spheerica Pse. P. Zool. Soc. London, 1869, p. 649; J. Conclul. xviii, 1870, p. 94. 



T. globosa, solida, umbilicata, dextrorsa, epidermide oblique rugoso- 

 striata induta; spira brevis, conica, acutiuscula; anfr. 5, vix inflatis; sutura 

 impressa. simplex; apertura rotundata ; plica columellaris valida, linguae- 

 formis, callosa; fusca, apertura alba, apice nigra. Alt. 9, diam. 12 mill. 



Shell globose, solid, umbilicate, dextral, covered with an epi- 

 dermis obliquely rugose-striated ; spire short, conical, somewhat 

 acute; whorls 5, scarcely inflated; suture impressed, simple; aper- 

 ture rotundate ; columellar fold strong, tongue-like, thickened; 

 brown, aperture white, apex black. 



Hab. Kauai. — Pse. L,anai. — Bald. 



