NO. I ACHATINELLA APEXFULVA DIXON — WELCH I25 



9.6 mm., number of whorls 6. The color pattern of the lectotype is 

 a characteristic one of the North-South Kaukonahua Ridge. 



Distribution, area 6i ? : North-South Kaukonahua Ridge, locality 

 275?, approximate elevation 1,650-1,810 feet, Meinecke, 1923 (figs. 5, 

 5a, p. 105). Also collected by Wilder, BBM 50576. Lectotype, ANSP 

 108778. Type locality, the "upper part of the Kaukinehua [Kauko- 

 nahua] ridge" (Pilsbry and Cooke, 1914), collected by I. Spalding. 



In the Wilder collection there is a series of 22 shells, all sinistral, 

 which probably come from the region of the type locality or the 

 locality of the lectotype. Wilder collected with Spalding, and it is 

 probable that the Wilder lot is from the same place. The shells in 

 the Wilder lot have a uniform color pattern which may mean either 

 that Wilder selected out his color patterns, or that the lot is from a 

 localized area of fairly limited extent. I am inclined to believe it is 

 from a small area because the shells are very similar to those obtained 

 by Meinecke on this ridge in area 61 ?. 



The usual form of the shell in the Wilder lot, BBM 50576 (pi. 2, 

 fig. 29), and the color pattern on 59 percent of the shells has the 

 embryonic whorls bicolored, first whorl cinnamon drab, next whorl 

 upper half white, lower half cinnamon drab, last embryonic whorl 

 white; postembryonic whorls white, lined just above or at the edge 

 of the periphery with sayal brown, last whorl and a half spirally lined 

 with sayal brown and cinnamon bufif; lip and columella callus pale 

 vinaceous fawn. Length 18.5 mm., greater diameter 12.3 mm., spire 

 height 9.7 mm. 



A variation of the typical pattern (pi. 8, fig. 14) found on three 

 shells is a light pattern; postembryonic whorls white, last whorl 

 at the edge of the periphery faintly banded with pale pinkish buff 

 and cinnamon buff. Another characteristic color pattern (pi. 8, 

 fig. 14a) occurring on 27 percent has the postembryonic whorls white, 

 last whorls faintly spirally lined and banded with pale pinkish bufif, last 

 whorl lined at the edge of the periphery and banded and lined below 

 the periphery with hay's maroon; impressed sutural band, on the 

 first postembryonic whorl and a half russet, on the last whorl and a 

 half light bufif with a line of russet on the lower half of the band. 



ACHATINELLA APEXFULVA IRWINI var. i 



Plate 2, Figure 30; Plate 8, Figures 15-1S& 



Achatinella leucorraphe irwini Pilsbry and Cooke, Man. Conch., vol. 22 ,pp. 302, 

 303, Pl- 59, figs. 10, II, 11& (only), 1914. 



Area 62?: North-South Kaukonahua Ridge, locality 277?, ele- 

 vation 1,750-1,900 feet, Meinecke, BBM 122671, 1923, BBM 121973- 

 121974, 1918 (figs. 5, 5a, p. 105). 



