AMASTEA. 319 



110. A. HAWAIIENSIS n. sp. PI. 42, figs. 7, 8. 



Shell imperforate, ovate-conic, thin but rather strong, white 

 or faintly flesh-tinted under a thin, pale, yellowish-brown 

 cuticle. Outlines of the spire straight, the embryonic whorls 

 smooth, as in A. flavescens; following whorl strongly convex, 

 with fine sculpture of growth-wrinkles. Last whorl inflated, 

 short, often weakly subangular at the periphery, in front of 

 the aperture. Aperture white; outer lip a little obtuse but 

 not thickened within. Columellar fold moderately strong; 

 parietal callus distinct or rather thick, dirty whitish. 



Length 11.8, diam. 8, aperture 6.5 mm. ; 5% whorls. 



Length 12, diam. 7.9, aperture 6 mm.; 5% whorls. 



Hawaii: Waimanu, in the northeastern part of the island 

 (Baldwin). Cotypes, no. 105540, coll. A. N. S. P., and in the 

 Boston Society and Baldwin's collections. 



This species, while closely related to A. flavescens, is per- 

 fectly distinct by its shortened form. In old shells the sinus 

 below the columellar fold is preceded by a plicate area, show- 

 ing former positions of the margin. 



Mr. Baldwin states that this is the only true Amastra ever 

 found on plants. According to Mr. Henshaw the shells were 

 taken in the deep forest at an altitude of 2550 ft. All were 

 found either on the Olona or near them on the ground. This 

 plant, Touchardia latifolia, is generally four to six feet high 

 with large leaves but slender stems. It is the favorite resort 

 of Laminella. L. alexandri is about the only exception, it 

 being found at a much higher altitude than where the olona 

 grows. Mr. Henshaw thinks the Amastra may have a wide 

 range at about the elevation of 2500 ft. In a subsequent 

 letter he states that 85 per cent of the shells were found on 

 the olona and ferns beneath. They affect ferns that are 

 partly dead and also partially dead leaves found upon the 

 ferns, a few varieties found upon the ground beneath the 

 dead leaves. 



AMASTRA OF UNKNOWN HABITAT. 



An examination of the type specimens of the following 

 species would probably reveal their approximate habitats to 



