Original Descriptions of Achatinella. 19 



whorls 6, first 4 somewhat convex, whitish, the rest convex ; spire 

 slightly concave ; .aperture white ; lip tinged with brown at the 

 margin, thickened within; columellar fold strong, whitish. 



Hab. The typical forms are found in Waipio and Wahiawa 

 on Oahu. Varieties are sometimes found in Kalaikoa and Aho- 

 nui. — Gk. 



Mr. Gulick says : It is most nearly allied to A. versicolor Gk., 

 and A. tubera?is Gk. 



14. Achatinella cookei Baldwin. 



A. cookei Bald. P. Acad. Phil., 1S95, p. 220; pi. x, fig. 15. 



Shell dextral, subperf orate, solid, globose, with spire regularly 

 conical, apex subacute ; surface shining, marked with fine incre- 

 mental lines; the apical whorls smooth. Color, basal portion 

 below the periphery jet black or sometimes brownish black, the 

 apex white, rest of the shell very light brown, darker on the sutural 

 margin. Whorls 6, margined above, the first three plain, the rest 

 convex, the last inflated ; suture well impressed. Aperture very 

 oblique, oval, white within ; peristome obtuse, slightly thickened 

 within, narrowly reflexed, the columellar margin forming an obtuse, 

 sinuous ridge, with the small umbilical cleft almost covered by it; 

 extremities united by a thin callus ; color purplish brown on both 

 face and the reflexed portion ; columella terminating in a strong 

 flexuous tubercle, tinged with purplish brown. Length 21, 

 diam. 15 mm. 



Animal : Mantle dark slate with a narrow brown band en- 

 circling the outer edge. Superior portion of foot light brown, 

 mottled with slate, under surface dingy white. 



This species is rare and very local in its distribution. It has 

 affinities with A. turgida Newc. , which is found in the same district, 

 but differs somewhat in form and in the peristome. We are un- 

 acquainted with the animal of A. turgida. If it proves identical 

 with that of A . cookei, the latter must rank as a variety of the 

 former. — Bald. 



Hab. Waiau, Ewa. — Bald. 



Somewhat related to A. turgida Newc. 



15. Achatinella ovum Pfeiffer. 



A. {Achatinellastrutn) ovum Pfr. P. Zool. Soc. London, 1856, p. 334. 



A. testa sinistrorsa, imperforata, globoso-conica, solida, uguloso-striata, 

 uitidula, albida ; spira concaviusculo-conica, apice acuta; sutura profunda 

 marginata ; anfr. 5 1-2, superis planis, sequentibus convexis, ultimo inflato, 



