Original Descriptions of Achatinella . 43 



letely plaited ; aperture oblique, truncately oval, light brown 

 within ; peristome scarcely thickened within ; with external mar- 

 gin anteriorly reflected, arcuate ; columellar margin dilated, not 

 appressed ; parietal margin wanting. 



Length 0.76 in. ( 19 1-3 mill.), breadth 0.42 in. ( 10 2-3 mill.). 



Length of body whorl 0.53 in. (13 1-2 mill.). 



Weight 2.50 grains. 



Remarks. Somewhat resembles A. dndd/i 'Newc, in style of 

 coloring, but lacks the black tip of that species, and decidedly 

 differs in the refledled lip, and deeply perforated umbilicus. 



Hab: Hawaiian Ids. — Gk. Niu. 



51. Achatinella fusco^ona Smith. 



A. fuscozona Sm. P. Zool. Soc. London, 1S73, p. 76; pi. ix, fig. q. 



Testa sinistrorsa, ovato-conica, perforata, parum nitida, incrementi lineis 

 et transversim (sub lente) minutissime striata, albida, plusve minusve dilute 

 fusco oblique strigata, transversimque obscure lineata vel zonata ; sutura tlis- 

 tincte fusco marginata, anfract. 6 1-2, convexi, vdt. amplus ; apex nigrescens; 

 apertura alba; perist. tenue, intus leviter linibatum; plica columellaris 

 valida, rubescens ( interdum albida j. Long. 21, diam. 12 mill. 



Var. Testa elongato-conica ; sutura zona latissima fusca cincta. Long. 

 23 1-2, diam. 11 mill. 



Shell sinistral, ovately conic, perforate, hardly shining, trans- 

 versely and very minutely striated with lines of growth, whitish, 

 more or less obliquely striped with light brown, and transversely 

 obscurely lined or banded ; suture distincflly margined with brown, 

 whorls 6 1-2, convex, the last broad; apex blackish; aperture 

 white ; lip thin, lightly edged within ; columellar fold .strong, red 

 (sometimes whitish). 



Var. Shell elongately conic ; suttire encircled with a very 

 broad brown band. 



Affinities. It is intermediate between ./. adusta Rve. and 

 A. bicddii Newc. 



Hab. Makiki, on Oahu ; two or three specimens have been 

 found in Palolo. , 



Mr. Baldwin places this shell with A. bt(ddii Newc. It is also 

 very near to A. pexa Gk. Dr. Cooke found the type .shell to be a 

 white variety of A . bnddii. 



52. Achatinella augusta Smith. 



A. auKUila Sm. I'. 7ax>\. Soc. London. iHy.^, p. 74 ; pi ix. fig. 7. 



Testa sinistrorsa, ovato-conica, nitida, incrementi lineis et transversim 

 exilissime striata, viridis, saturate virifli strigata lineisque s])iralibus viridi- 

 bns rulJsque obscuris cincta, infra suturain all)am zona flava oniata ; sutura 



