ADDENDA. 



345. Achatinella irregularis Pfeiffer. 



Amas/ra ii}eg;ular!s Pfr. P. Zool. Soc. London, 1855, p. 205. 



A. testa imperf., dextr. , tenuiuscula, londitudinaliter confertim plicata, 

 nigricante, interdum albido-fasciata; spira irregulari, conica, obtusa; sutura 

 subcrenata; anfr. 5 1-2 celeriter accrescentibus, convexis, penultimo gibbo, 

 ultimo 3-7 longitudinis subttquante, infra medium l^Eviore, interdum corneo; 

 apertura vix obliqua, ovali-oblonga; plica coli;m. supera, parum prominente; 

 perist. simplice, margine dextro antrorsum subarcuato, columellari dilatato, 

 adnato. Long. 9, diam. 4 1-3 mill. 



Shell imperforate, dextral, quite thin, longitudiualh' closely 

 plicate, blackish, sotnetimes banded with white ; spire irregular, 

 conic, obtuse; suture subcrentilate; whorls 5 1-2 rapidly increas- 

 ing, convex, the penultimate gibbous, the last nearl}- equal to 

 3-7 of the length, smoother below the peripher}', sometimes corne- 

 ous; aperture hardly oblique, oval-oblong ; columella fold high, 

 hardly prominent; lip simple, dextral margin slightly arcuate be- 

 low, columellar margin dilated, adnate. 



Hab. ? 



346. Achatinella alba Nuttall. i^ 



A. alba Nuttall. Jay, Cat. Shells, Ed. iii, 1S39. p. 58 (nomen. .sohnn). 



This shell equals A. lorata Fer. (white variet}-). 

 Hab. Oahu. 



347. Achatinella vestita Mighels. 



A. veitita Migh. Proc. Bost. Soc, ii, 1845, p. 20. 



vShell sinistral, acuminate-conical, light brown, or white, with 

 beautiful, narrow, dark brown bands, more or less numerous, im- 

 perforate; whorls 6, convex; aperture semilunate; lip refle(5led. 



Average length i in., diam. 1-2 in. 



Hab. Waianae, Oahu. — Migh. 



348. Achatinella seminigra Lamarck. 



Monodonta seminigi a Lam. Hist. Nat. .\iiini. Paris. 1843, vol. ix, p. 181. 



M. testa oblique conica, imperforata, keviuscula, inferne nigra, superne 

 alba; dente columellari albo; labro simplici. 



(185) 



