AMASTRA, MOLOKAI. 277 



roughness of the epidermis; its embryonic sculpture is un- 

 known. A. subobscura resembles dimissa in miniature. 



Three specimens, no. 13447, Boston Society, also belong to 

 this species, and were studied by the senior author and the 

 present writer. The ground-color is pale yellow with oliva- 

 ceous cuticle, fleshy-yellowish, and fleshy-brown with chestnut 

 cuticle. The parietal callus is very thin. 



Series of A. pusilla. 



Two Molokaian species seem to belong with the Lanaian 

 A. pusilla. They are banded or banded and streaked, but 

 without angular zigzag markings or mottling. 



80. A. TRICINCTA n. sp. PL 39, fig. 15. 



Shell perforate, ovate-conic, very small, thin, a little shin- 

 ing. Outlines of the spire nearly straight, Embryonic 

 whorls somewhat convex, the first half nearly smooth, cari- 

 nate close above the suture, the next whorl very finely costu- 

 late or sharply striate, subangular close above the suture. 

 Following whorls moderately convex, marked with fine, ir- 

 regular growth-wrinkles. Last whorl rounded peripherally. 

 Dark brown, the last whorl having opaque white revolving 

 bands at the suture, periphery and around the umbilical slit, 

 and several narrow, obliquely longitudinal, black streaks; 

 upper whorls reddish-brown. Aperture dark within, show- 

 ing a median white band. Outer lip thin, acute. Colurnella 

 dark, bearing a rather thin, strongly oblique lamella. Length 

 8.8, diam. 5, aperture 4.3 mm. ; 5 Whorls. 



Molokai : Kolekole. Type to be deposited in Bishop Mu- 

 seum, 'collected by Mr. D. Thaanum. 



About the size of A. petricola, from which it differs in char- 

 acters of the embryonic whorls and in coloration. A very 

 distinct species. 



81. A. ELEGANTULA n. Sp. PI. 40, fig. 15. 



The shell is imperforate, small and rather thin, ovate with 

 straightly conic spire. The last whorl is very pale brown, 

 lighter at the suture, with an opaque white band at the peri- 

 phery, and sparsely streaked with brown, becoming chestnut- 



