no SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



This race is apparently an intermediate between z'irgatifulva var. i 

 (area 75) and eivaensis var. 8 (area 59), This race usually occurs 

 mixed with A. a. (nvaensis var. 8, and I do not know w^hether it is a 

 pure race or not. Probably the reason for the mixture is that all the 

 collecting has been done over a wide area and the one locality that is 

 not of wide extent may be a region where the two races overlap. 



The usual color pattern (pi. 2, fig. 21) has the embryonic whorls 

 bicolored; first half embryonic whorl hair brown, last half upper 

 half white, lower half hair brown, next embryonic whorl and a half 

 upper half white, lower half with two bands each covering a fourth 

 of the whorl, the lower one benzo brown, the upper honey yellow, last 

 half embryonic whorl upper half white, lower half chamois; first 

 one-half postembryonic whorl white, with a line just above the edge 

 of the periphery of chamois, next whorl white, lined with pinkish 

 cinnamon, just above the edge of the periphery a line of verona 

 brown, last whorl and a half white, shading to pale gull gray, spirally 

 lined and banded with deep brownish drab; impressed sutural band 

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

 whorl and a half the color darkening from cartridge buff to tawny 

 on the last whorl ; lip and columella callus pale vinaceous fawn. 

 Length 18.4 mm., greater diameter 12.2 mm., spire height 9.8 mm., 

 number of whorls 6-J. The usual form is not determined because 

 so few adult specimens of this race are at hand. 



The color pattern varies. A dextral (pi. 9, fig. 10) has the post- 

 embryonic whorls white, first half of last whorl banded above the 

 periphery with a band of avellaneous and faintly axially streaked 

 with tilleul buff', below the periphery the axial streaks deepening to 

 vinaceous buff, last half whorl tilleul buff axially streaked with vina- 

 ceous buff, all below the periphery and just above the periphery the 

 base is lined, banded closely, axially streaked with fine streaks of 

 grayish olive and benzo brown, with a dark subperipheral band of 

 mouse gray ; impressed sutural band on the last two whorls tawny ; 

 subsutural band deep quaker drab. This specimen has the light streak- 

 ing of the lower race and the gray banding of the upper race. 



The color pattern may be lighter (pi. 9, fig. 11); first half of 

 penultimate pale ])inkish buff", spirally lined with cinnamon buff', last 

 whorl and a half tilleul buff', spirally lined and axially streaked with 

 wood brown and drab. 



A specimen (pi. 9, fig. iia) is found which has a pattern very 

 similar to the typical tuberans pattern (pi. 9, fig. 12). The shell is 

 not adult ; first postembryonic whorl white, spirally lined with mikado 



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