802 ACHAT1NELLA LEUCORRAPHE. 



' ' Kalaikoa, on the island of Oahu. Waimea ? a variety with 

 spire regularly conical is reported to have been found in Wai- 

 mea [this = A. valida var.]. It is allied, though not very in- 

 timately, to A. apicatus Nwc. No sinistral form of this species 

 has been found. The specimen figured is from Kalaikoa.' 

 (Gulick.) 



Oahu: Kalaikoa (Gulick). Varieties on the ridges between 

 Kipapa and north Kaukinehua. 



Apex leucorraphe GULICK, P. Z. S., 1873, p. 79, pi. 10, f. 2. 



The type specimen of A. leucorraphe, pi. 59, fig. 8, no. 92 of 

 Gulick 's type series, Boston Soc., is a solid, compactly globose- 

 conic shell resembling A. swiftii in form. The tip of the em- 

 bryo is olivaceous black, this shade continues spirally down- 

 ward above the suture for about 1% whorls, the upper part 

 of which is white. The last 2y 2 whorls are olivaceous black 

 or iron gray with streaks and zigzag tracery or mottling of 

 white. At places of growth-arrest and just behind the lip there 

 are brownish streaks. The suture has a white margin broader 

 than the subsutural impression. The aperture and peristoine 

 are white, with the faintest suggestion of violaceous. A nar- 

 row white line is traced around the periphery, but scarcely 

 noticeable except on the back. Length 19, diam. 12.1 mm. 



The unnamed variety noted by Gulick as reported from 

 Waimea is certainly a form of A. valida leucozona. Part of 

 the lot is before me. 



Recent collectors have not found specimens of the original 

 color-pattern of leucorraphe, but a good many shells collected 

 by Messrs. Spalding, Kuhns and Wilder are evidently color- 

 varieties of Gulick 's species. The original leucorraphe colony 

 in Kalaikoa was doubtless long ago destroyed by recession of 

 the forests. It must have been at the lower limit of the 

 species, which belongs in the main to the high ridges. 



35a. A. LEUCORRAPHE iRwiNi n. subsp. PL 59, figs. 9 to 15a. 



The shell is dextral or sinistral, compactly globose-conic. 

 Embryonic whorls bicolored, white with a dark helicoid spiral 

 which is olive-black or clove brown at the tip (or when the sur- 



