Orio^hial Descriptions of Acliatindla. 97 



apex somewhat acute : suture simple ; whorls 6 1-2, scarcely con- 

 vex, the last a little shorter than the spire, convex ; columellar 

 fold white, short, oblique : aperture oblique, obauriform ; lip 

 thickened, shortly expanded, widely dilated at the margin of the 

 columella, broadly aduate. 



Hab. Oahu.— Bald. 



Dr. Cooke found the type shell to be near to A. dubia Newc. 



Shells from Molokai. 



BELLA GROUP. 

 150. Achatitiella bella Reeve. 



A. bclla Kve. Conch. Icon. Achat., London, 1S50, .sp. 17. 



Shell conical, dextral, whorls rather ventricose, columella wath 

 a twisted plait ; olive-yellow, sutures black-brown, then white- 

 banded, last whorl brown and white-banded. 



Hab. Kalae to Waikolu.— Bald. 



There is a large variety of color markings fouud in this species. 

 Some examples are almost pure white ; others approach very 

 nearly to the following, A. tnighelsiana Pfr. 



151. Achatinella mighelsiana Pfeiffer. 



./. iiiiiilichiaini rfr. 1*. Zool. Soc. London. 1S.J7. j). 231. 



Ach. testa ovato-coiiiformi hevij< it:i, opaca, nitida, nivt;a, slrij.ii,s ciiicR-is 

 varicgata ; spira conica, apicc aciitiiisciila ; sutiira subniarj^inata ; aiifracti- 

 bus 5 1-2 convexis, uUinio infra medium linca nij^ricantc ( intcnluiii tlupli- 

 catajcincto; plica columellari valida, ckntiformi, basi castaiica ; apertura 

 sciniovali, fusco-murj^in-ita ; peristomitc simplice, acuto. Lonj.^. 17, diam. 

 8 mill. 



Shell ovatcdy coniform, smooth, ojiaque, shining, snow-white, 

 variegated with ash -colored stripes ; spire conical, apex somewhat 

 acute; suture submarginate ; whorls 5 1-2, convex, the last en- 

 circled below the periphery V)y blackish line (.sometimes doubled); 

 columellar fold strong, tooth-like, ba.se chestnut ; a])erture .semi- 

 oval, margined with brown ; lip simple, acute. 



Hab. Kalae.— Bald. 



<'.)ttAi.IO.N'AL I'AI'KKS B. I". U. M., VoL. II, XO. 3.-7. 



