144 AMASTRA, KAUAI. 



the suture on the last 2 or 3 whorls, or concealed on all but 

 the last whorl, on the latter half of which it becomes more 

 prominent. Base convex. Whorls 6%, but slightly convex. 

 Dull red-brown, becoming darker, purplish-brown at the apex, 

 and paler, yellowish, ait the base. There is a whitish border 

 below the suture throughout. Aperture oblique, white within ; 

 outer lip thick; columella bearing a strong spiral fold below 

 the middle. 



Length 23.5, diam. 19 mm. 



Length 23, diam. 17 mm. 



Kauai : Halemanu (Baldwin) ; Makaweli -at 2000 ft. and 

 Halemanu 'at 4000 ft. (Perkins) . Type in Newcomb coll. 



Achatinella kauaiensis NEWC., Ann. Lye. N. H. of N. Y., 

 vii, 1860, p. 145; Amer. Journ. of Conch., ii, p. 209, pi. 13, 

 f. 1. PFR., Novit. Conch., iv, p. 115, pi. 126, f. 8, 9 and f. 10, 

 11 (embryo). BALDWIN, Catalogue, p. 9. Amastra (Kau- 

 aia) k., SYKES, Fauna Hawaiiensis, p. 355. Helicter kau- 

 wiensis PEASE, Journ. de Conchyl., xviii, 1870, p. 88. 



The cuticle is thin and of a light brownish tint, the darker 

 color being in the substance of the underlying shell. The 

 embryonic shell figured by Pfeiffer is angular at the periph- 

 ery and measures 7.5 mm. long. The specimens figured were 

 received from Dr. Newcomb. 



In some examples there is the weak indication of a carina 

 at the shoulder, especially on the latter part of the last whorl. 

 It is faintly shown in fig. 3. This character, which is only 

 occasionally obvious, shows a relationship to A. knudseni, in 

 which a stout ridge is developed in the same position. 



''There are two types of the apex, one somewhat more 

 pointed than the other, and with smoother and more shining 

 horn-color due 'to the finer striae of growth, and the dorsal 

 outer sides are not strictly flat, slightly rounded, and maybe, 

 have a slight shoulder even on the first volution in some 

 specimens. The striae are not strictly parallel, but may be a 

 little irregular. The other type has more regular fold-like 

 longitudinal bands of growth from an early stage, and the 

 dorsi of the volutions are flatter" (Hyatt). 



The axis is tubular, the tube rather strongly contracted in 



