Original Descriptions of Achatinella . 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 adnate. 



Hab. Oahu— Bald. 



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



Shells from Molokai. 



BELLA GROUP. 

 150. Achatinella bella Reeve. 



A. bella Kve. Conch. Icon. Achat., London, 1.850, sp. 17. 



Shell conical, dextral, whorls rather ventricose, columella with 

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

 banded, last whorl brown and white-banded. 



Hab. Kalae to Waikolu.— Bald. 



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

 Some examples are almost pure white ; others approach very 

 nearly to the following, A. mighelsiana Pfr. 



151. Achatinella mighelsiana Pfeiffer. 



A. mighelsiana Pfr. P. Zool. Soc. London. 1*47. p. 231. 



Ach. testa ovato-coniformi laevigata, opaca, nitida, nivea, strigis cinereis 

 variegata ; spira conica, apice acutiuscula ; sutura submarginata ; anfracti- 

 bus 5 1-2 convexis, ultimo infra medium linea nigricante (interdum dupli- 

 cata) cincto ; plica columellari valida, dentiformi, basi castanea ; apertura 

 scmiovali, fusco-marginata ; peristomate simplice, acuto. Long. 17, diam. 

 8 mill. 



Shell ovately coniform, smooth, opaque, 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 by blackish line (sometimes doubled); 

 columellar fold strong, tooth-like, base chestnut ; aperture semi- 

 oval, margined with brown ; lip simple, acute. 



Hab. Kalae. —Bald. 



Occasional Papers B. P. B. M., Vol. II, No. 3.-7. 



