NO. I ACHATINELLA APEXFULVA DIXON — WELCH 63 



mate cream buff lined with tawny, last whorl antimony yellow lined 

 above the periphery with tawny, below and at the periphery with 

 chestnut; lip warm sepia, columella callus white. Length 18.7 mm., 

 greater diameter 12.5 mm., spire height 9.6 mm., number of 

 whorls 6^. 



Eight percent are dark brown above the periphery and yellow be- 

 low (pi. 5, fig. 150) ; the postembryonic whorls tawny faintly lined 

 or tinted with warm buff, banded above and below the periphery 

 with chestnut, below and at the periphery the ground is naples yel- 

 low. The typical form of a shell of the 19-l-mm. length class (pi. 

 5, fig. 15) measures: Length 19.7 mm., greater diameter 13.6 mm., 

 spire height lo.o mm. ; postembryonic whorls shade from white to 

 light buff on the last half of the penultimate, last whorl above 

 the periphery white, tinted with light buff, finely spirally lined with 

 faint lines of chamois, below the periphery ground is mustard yellow 

 within the aperture lightening to naples yellow, and spirally lined with 

 buckthorn brown, except behind the edge of the lip where the bands 

 and lines are russet; impressed sutural band russet. The lightest 

 yellow pattern (pi. 5, fig. 15&) has the postembryonic whorls white up 

 to the last whorl which is mustard yellow with a line of ochraceous 

 tawny at the edge of the periphery. 



The dextral race of hriineola var. 2 is probably a remnant of two 

 races. The lower, a brown race similar to typical A. a. bruneola, may 

 possibly have been a pure one and not mixed with the yellow or upper 

 form similar to A. a. aureola. Above the brown race yellow forms 

 existed, and locality 170C-6 is the point where the two races over- 

 lapped. 



The Wilder lot, BBM 50528, may indicate that a yellow race 

 occurs between areas 24 and 25. The shells were probably collected 

 over a wide area inclusive of area 24 because of the presence of white 

 shells; and above area 25 because no dextrals are found in the lot. 

 One specimen has a brown color pattern (pi. 5, fig. 16) ; postembry- 

 onic whorls white, banded on the first postembryonic whorl with 

 tawny, last whorl banded with chestnut. Thirty-three percent have a 

 yellow pattern similar to that of plate 5, figure 15. Sixty percent have 

 whitish color patterns similar to those of plate i, figure 31, and 

 plate 5, figure 6. The yellow shells are probably a sinistral race of 

 A. a. aureola, but because the locality is not definite, the range of 

 color variation is not known and these shells have therefore been 

 lumped with A. a. bruneola var. 2 until more data are obtainable. 

 In like manner the white forms are probably A. a. ovum var. 2. 



