NO. I ACHATINELLA APEXFULVA DIXON — WELCH I7I 



come from the Helemano-Opaeula Ridge, which is the division ridge 

 between the districts of Paala and Kawailoa. This ridge is the most 

 northern ridge known to contain white beata-Wke shells. 



ACHATINELLA APEXFULVA BEATA var. i 



Plate 3, Figure 16; Plate ii, Figures 11-13 



Achatinella apcxjulva bcata Pilsbry and Cooke, Man. Conch., vol. 22, p. 329, 

 pi. 60, fig. 17 (only), 1914. 



Area 94: Poamoho-Helemano Ridge, locality 302, elevation 1,750 

 feet, Meinecke, 1916, 1932, Russ, 2 dextral 1933; 302-291-5, eleva- 

 tion 1,750-1,802 feet. Baker and Welch, 2 dextral 1935; North- 

 Central Poamoho Ridge, locality 291-3-5*, elevation 1,650-1,802 

 feet, 1916-1917, 1932; 291-5, elevation 1,750-1,802 feet, 4 dextral 

 1934, all Meinecke localities. Also collected by Wilder, BBM 50568- 

 50569, and others. 



Area 94-94a?: North-Central Poamoho Ridge, locality 291-2?. 

 elevation 1,600-1,700 feet, 6 dextral 1932; 291-3?, elevation 1,650- 

 1,700 feet, 12 dextral 1926; 291-2-302?, elevation 1,600-1,800 feet, 

 1914, all Meinecke-coUected. The shells in this area contain a mixture 

 of color patterns of typical A. a. ccrvixnivea and hcata var. i. All 

 the localities are plotted from memory and are of wide extent. Prob- 

 ably if more localized collecting were done in area 94a, the lower por- 

 tion of the ridge might contain only ccrvixnivea while the upper por- 

 tion of area 94 might contain a dominance of the dark color pattern 

 of bcata var. i (figs. 5, 50. p. 105). 



Pilsbry also considered this race a form of bcata; actually it is a 

 distinct race existing between bcata and ccrvixnivea with a color 

 pattern distinct from both. However, this form is so close to the 

 typical apcxfulva that it is almost impossible to tell the difference 

 between the forms. Typical apexfulva usually has forms with the 

 last whorl a light yellowish color and banded, lined, and axially 

 streaked with chocolate or black, while ccrvixnivea var. i usually has 

 a solid color or patterns intermediate with typical ccrvixnivea or heata. 



The usual form (pi. 3, fig. 16) from locaHty 291-3-5 measures: 

 Length 19.4 mm., greater diameter 13.4 mm., spire height 10.3 mm.; 

 the color pattern is a little lighter than usual ; embryonic whorls light 

 bufif; last two and a half postembryonic whorls chocolate, tinted or 

 lightened with streaks of mahogany red ; impressed sutural band warm 

 buff, shaded on the lower half of the band on the last whorl with 

 russet ; lip and columella callus white. 



