90 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



The narrow form of the shell (pi. 8, fig. 19) measures: Length 

 18.4 mm., greater diameter 10.8 mm., spire height 10.2 mm. ; the 

 color pattern is similar to plate 2, figure 3. An obese shell (pi. 8, 

 fig. 20) from locality 232B exhibits the tan color pattern, which 

 occurs on 22 percent of the shells in the type locality; the embryonic 

 whorls are white; postembryonic whorls ochraceous buff, last half 

 of the penultimate and last whorl just above the periphery and be- 

 low the periphery mouse gray axially streaked with ochraceous buff ; 

 impressed sutural band the color of the ground except on the first post- 

 embryonic whorl, where it is tawny. Length 19.0 mm., greater di- 

 ameter 13.0 mm., spire height lo.i mm. Two specimens of this tan 

 color pattern were found to have the entire sutural band russet. 



A dextral shell from the Thurston collection is shown on plate 8, 

 figure 21. The color pattern is similar to plate 2, figure 3. 



In locality 233B-1*, 48 percent of the 13 dextral shells have a gray 

 pattern similar to typical A. a. albipraetexta, except that the post- 

 embryonic whorls are not banded with gray. One of these (pi. 8, 

 fig. 18) has the embryonic whorls cartridge buff; first postembryonic 

 whorl cream buff shading to white, lined on the first half of the whorl 

 with tawny, the periphery faintly spirally banded or tinted with pale 

 drab gray, below the periphery the color is drab or verona brown 

 axially streaked with white, behind the edge of the lip is a band 

 from 2 to 3 mm. wide of warm sepia. Plate 8, figure i8a, shows the 

 tan color pattern that occurs on 52 percent of the dextral specimens, 

 a color pattern similar to that of plate 8, figure 20. 



Thirty-two percent of the shells in 233B-1* are sinistral and differ 

 in the range of color patterns from the dextral shells in having lined 

 color patterns. The postembryonic whorls of the gray pattern (pi. 8, 

 fig. i8b) are white spirally lined or tinted on the last two whorls with 

 pale drab gray, just above or at the periphery a line of snuff brown, 

 last whorl below the periphery spirally banded with pale drab gray, 

 in the umbilical region banded with drab, pale pinkish buff, and 

 cinnamon. The tan pattern (pi. 8, fig. i8c) has the postembryonic 

 whorls white or pale pinkish buff, finely axially streaked or tinted 

 with pinkish buff, last whorl banded at the edge of the periphery 

 with white, below the periphery, spirally lined and axially streaked 

 with a light shade of sayal brown. 



ACHATINELLA APEXFULVA GRISEIBASIS, new subspecies 



Plate 2, Figure 6; Plate 8, Figures 17, 170 



The shell is close to A. a. lemkei but differs in color pattern. The 

 embryonic whorls of the holotype (pi. 2, fig. 6) are white except for 



