NO. I ACHATINELLA APEXFULVA DIXON — WELCH I39 



The usual color pattern and form of the shell (pi. lo, fig. 12) has 

 the embryonic whorls white ; postembryonic whorls pale vinaceous 

 fawn axially streaked with light vinaceous fawn on the first post- 

 embryonic whorl and light cinnamon drab on the penultimate, last 

 whorl ecru drab axially streaked with cinnamon drab and benzo 

 brown and faintly spirally lined and axially streaked with tilleul bufY ; 

 impressed sutural band same as the rest of the whorl, upper edge 

 white; lip and columella callus pale grayish vinaceous. Length 19.0 

 mm., greater diameter 12.0 mm., spire height 10.9 mm. 



An obese shell (pi. 10, fig. 12a) measures: Length 17.8 mm., 

 greater diameter 12.7 mm., spire height 9.1 mm. ; shows a very light 

 color form ; first half postembryonic whorl pale pinkish bufif, next 

 whorl and a quarter up to the last whorl light vinaceous fawn axially 

 streaked with a dilute shade of vinaceous fawn, last whorl pale ecru 

 drab axially streaked with cinnamon drab and tilleul buff on the last 

 whorl ; impressed sutural band white. White sutural bands occur on 

 one or two specimens in each lot. 



In the Russ lot from locality 280-1-280", 66 percent are pinkish 

 forms (pi. 10, fig. 12) and 36 percent bluish-gray forms (pi. 10, 

 fig. 12b; pi. 3, fig. 3). In the Meinecke lot from 280*, 56 percent are 

 pinkish forms and 44 percent bluish pink. Locality 281-2*, has 71 

 percent bluish forms, and 281 -i contains no pink forms. These last 

 two localities have been separated out into area 83a to emphasize the 

 trend toward bluish-gray color forms above area 83. More collecting 

 should be done in this region to determine whether bluish-gray shells 

 exist in a pure locality below area 84 where the streaked color pattern 

 changes but the color is definitely bluish gray. 



The usual color pattern and form of a bluish-gray shell (pi. 3, fig. 3) 

 has the embryonic whorls pale pinkish buff ; first postembryonic whorl 

 pale pinkish buff, last two whorls pale mouse gray axially streaked 

 with quaker drab, sorghum brown, and tilleul buff, last fourth whorl 

 tilleul buff axially streaked with avellaneous ; impressed sutural band 

 tilleul buff axially streaked with vinaceous buff; lip and columella 

 callus light vinaceous fawn. Length 19.0 mm., greater diameter 12.0 

 mm., spire height 10.5 mm. The color of the sutural band is unusual. 



The color pattern may be lighter, the form elongate and the im- 

 pressed sutural band white (pi. 10, fig. 12&), which is usual; embry- 

 onic whorls white; first half postembryonic whorl white, last half 

 white axially streaked with light vinaceous fawn, penultimate and last 

 whorl pale drab gray axially streaked with pale brownish drab and 

 light brownish drab; lip and columella callus light vinaceous fawn. 



