ADDENDA. 



345. Achatinella irregularis Pfeiffer. 



Amastra irregularis Pfr. P. Zool. Soc. London, 1855, p. 205. 



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

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

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

 ultimo 3-7 longitudinis subtequante, infra medium lseviore, interdum corneo; 

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

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

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



Shell imperforate, dextral, quite thin, longitudinally closely 

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

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

 ing, convex, the penultimate gibbous, the last nearly equal to 

 3-7 of the length, smoother below the periphery, 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. 



A. alba Nuttall. Jay, Cat. Shells, Ed. iii, 1S39, p. 5S (nomen. solum). 



This shell equals A. lorata Fer. (white variety). 

 Hab. Oahu. 



347. Achatinella vestita Mighels. 



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



Shell 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 reflected. 



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



Hab. Waianae, Oahu. — Migh. 



348. Achatinella seminigra Lamarck. 



Monodouta semiuigia Lara. Hist. Xat. Anim. Paris. 1843, vol. ix, p. 181. 



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

 alba; dente columellari albo; labro simplici. 



(185) 



