74 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



spirally banded above the periphery with a band of pale pinkish buflf 

 axially streaked with drab, peripheral line fuscous, subperipheral 

 band warm sepia streaked with hair brown and smoke gray, basally 

 lined with sepia; spire concave in outHne. 



The grayish color pattern (pi. 6, fig. i8) may be more lined than 

 figure 17; first postembryonic whorl mikado brown, faintly lined with 

 pale pinkish buff, penultimate whorl ground pale pinkish buff covered 

 with close-set axial streaks of drab, cinnamon drab and benzo brown, 

 spirally lined with fuscous, last whorl pale pinkish buff, banded above 

 the periphery with a Hght drab band which is lined with olive brown, 

 banded at the periphery with olive brown, below the periphery with 

 hair brown, lined with fuscous, lip light vinaceous fawn. This pattern 

 collected by Meinecke in area 40 is also found in the Cooke lots. 



Brownish color patterns are depicted on plate 6, figures \ja, lyh. 

 Figure 17a is an extreme elongate specimen, with the spire straight 

 in outline. Length 19.2 mm., greater diameter 11.8 mm., spire height 

 I I.I mm. Postembryonic whorls mikado brown, spirally lined and 

 faintly streaked with zigzag streaks of tilleul buff, peripheral band 

 tilleul buff lined with vinaceous buff. Figure lyh is a darker color 

 pattern and the obese form of the shell. Length 19.8 mm., greater di- 

 ameter 13.5 mm., spire height ii.o mm. First postembryonic whorl 

 cream color, with impressed sutural band ochraceous tawny, last 

 two whorls army brown streaked with pale smoke gray. 



Meinecke found a white sinistral specimen in locality 221^* (pi. 6, 

 fig. 1 8a) the postembryonic whorls white, first two postembryonic 

 whorls lined with pinkish buff, last whorl lined with cinnamon buff. 



While the paratype Cooke lots are all dextral, 46 percent of the 

 shells in the Wilder collection are sinistral. These sinistrals have a 

 different color pattern range from those collected by Cooke. Yellowish 

 or pink color patterns occur. The usual form and color pattern of 

 50 percent of the sinistrals (pi. 6, fig. 19) has the embryonic whorls 

 pale pinkish buff; first half postembryonic whorl pale pinkish buff, 

 axially streaked with sayal brown, next half whorl streaked with 

 army brown, penultimate and last whorl light drab axially streaked 

 with hair brown, and banded below the suture with white, last whorl 

 below the periphery white with two lines of benzo brown. Length 

 18.1 mm., greater diameter 12.3 mm., spire height 9.4 mm. 



A variant (pi. 6, fig. 19a) of the typical gray color pattern has the 

 first half of the first postembryonic whorl ochraceous tawny, last half 

 russet, penultimate tawny olive lined with smoke gray, last whorl 

 smoke gray spirally lined with tawny olive. It is an obese form. 

 Length 18.2 mm., greater diameter 13.3 mm., spire height 9.4 mm. 



