AMASTRA, OAHU. 189 



32. A. CRASSILABRUM ( Newcoxn'b ) . PI. 31, figs. 6, 7, 8. 



The shell is acuminately ovate, solid ; the embryonic whorls 

 are purple-brown tipped with white, spire brown, last whorl 

 opaque, white or cream-white. The spire has slightly concave 

 outlines, being slender above. The embryonic whorls are 

 quite convex and are very finely striate, generally worn 

 smooth in adults ; subsequent whorls of the spire marked with 

 fine, irregular growth-lines only ; the last whorl generally mal- 

 leated throughout, or only in the last half. Aperture oblique, 

 white within. Peristome somewhat obtuse, with a light brown 

 edge, and bordered by a strong callous rib within. Baso- 

 columellar junction somewhat spout-like. Columellar lamella 

 strong. Parietal callus rather thick,, subtransparent. Axis 

 rimate or closed. 



Length 14.5, diam. 7.8, aperture 6.5 mm. ; 6% whorls. 

 (Lihue.) 



Length 15, diam. 8, aperture 7 mm.; 6 l / 3 whorls. (Lihue.) 



Length 12.5, diam. 6.7, aperture 5.9 mm.; 6 whorls. 

 (Lihue.) 



Length 15, diam. 7.5 mm.; whorls 6 (Newcomb). 



Oahu: Waianae (Newcomb, Baldwin); Lihue (Gulick) ; 

 near Mt. Kaala (Thwing). Co-types in coll. Newcomb and 

 British Museum. 



Achatinella crassilabrum NEWC., P. Z. S., 1853, p. 141, pi. 

 23, f. 31 (1854). THWING, Orig. Descriptions, etc., p. 157. 



A very distinct, easily recognized species. The brown color 

 of the spire often extends over the front of the last whorl. 

 There is generally a light line just above the suture on the 

 penult, whorl. Many specimens from two localities, including 

 specimens from Newcomb, show but little variation. The re- 

 lated A. cornea differs in the color and sculpture of the last 

 whorl. Very rarely traces of spiral incised striae are visible 

 in recent specimens. They are rather well developed in fossil 

 specimens from Waianae in Dr. Cooke's collection. These 

 shells also have the outer lip very thick, like A. vetusta Baldw. 



33. A. SUBCORNEA Hyatt and Pilsbry, n. sp. PI. 31, fig. 11. 

 This is a subfossil shell smaller than cornea, but with a 



