26 AMASTRA. 



The specimens of A. ultima were probably from the lava 

 flow of 1887, which ran through Kahuku. 



Section METAM ASTRA (Oahu). 



A. EOS Pilsbry & Cooke, n. sp. PL 2, figs. 14, 15. 



The shell is perforate, thin, globose-conic, chestnut brown, 

 darker along the suture, the base paler, marguerite yellow, 

 at least near the axis. Surface slightly lustrous, finely, irre- 

 gularly striate, without spiral lines. Apical whorls smooth. 

 Outlines of spire straight above, convex below. Whorls 

 strongly convex immediately below the suture. Outer lip 

 thin; columellar lamella thin, moderately oblique. 



Length 12.4, diam. 8, aperture 6.25 mm., 6 whorls. 



Length 12, diam. 8.5 mm. 



Oahu: Keawaawa. Cotypes no. 108171 A. N. S. P.; also 

 in coll. Thaanum. Kuliouou, W. D. Wilder. 



The living shell has a good deal of adhering dirt. Com- 

 pared with A. breviata Baldwin, of Halawa and westward, 

 this species differs by being thinner, without creamy mark- 

 ings, and especially by being swollen just below the sutures. 

 A. breviata is very closely related to the Main Range form of 

 A. reticulata. 



The division of colors on the last whorl is generally con- 

 spicuous and abrupt in immature shells, but in old ones the 

 colors become blended, though the bipartite pattern is visible 

 on close inspection. 



A. eos is from the eastern limit of Amastra in Oahu. We 

 fancy that the two localities given above really denote the 

 same colony, where Messrs. D. B. Kuhns and W. D. Wilder 

 collected. There has been some uncertainty among collectors 

 as to the limits of the two valleys. 



A. TRANSVERSALIS BRYANI n. Sllbsp. PL 2, fig. 16. 



The shell is perforate, cylindric with conic spire, rather 

 solid. Sculpture of irregular growth-wrinkles which are a 

 little puckered and retractive next the suture, and are never 

 cut into oblong granules, or crossed by impressed spiral lines 

 as in A. transversalis or caputadamantis. The best preserved 



