76 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



last whorl hessian brown; lip and columella callus light vinaceous 

 fawn. Length 19.4 mm., greater diameter 14.2 mm., number of whorls 

 6. While the shell of figure 8 does not match the original figure and 

 measurements in all details, it comes from what is supposed to be the 

 type lot and best matches the form of Baldwin's original figure. This 

 shell is therefore considered the lectotype. 



The usual form of the shell selected from the original type lot 

 collected by C. H. Cooke is shown on plate 7, figure 9 ; the embryonic 

 whorls white ; postembryonic whorls pale pinkish buff tinted with light 

 buff, lower half of last whorl a dark shade of diamine brown or dark 

 livid brown. Length 19.2 mm., greater diameter 13.4 mm., spire 

 height 9.8 mm. A narrow specimen (pi. 7, fig. 10) obtained in the 

 type lot has the postembryonic whorls white, with the base warm 

 blackish brown. Length 19.5 mm., greater diameter 12.8 mm., spire 

 height 10.4 mm. 



Plate I, figure 49, shows a dextral specimen from locality 225-1. 

 The postembryonic whorls are white, last whorl lower half warm 

 blackish brown. Length 19.5 mm., greater diameter 12.8 mm., spire 

 height 10.6 mm., number of whorls 6^. 



The range of color patterns in the Wilder collection is shown on 

 plate 7, figures 1 2-1 2d. All with the exception of the shell of figure 

 I2d have the lower half of the last whorl a deep shade of diamine 

 brown or warm blackish brown. The usual form and color pattern 

 (pi. 7, fig. 12) has the postembryonic whorls white, tinted with 

 ochraceous tawny ; impressed sutural band ochraceous tawny. Length 

 18.3 mm., greater diameter 12.3 mm., spire height 9.7 mm. An elon- 

 gate shell (pi. 7, fig. 12a) with an entirely white spire measures: 

 Length 19.6 mm., greater diameter 12.3 mm., spire height 10.9 mm. 



Thirty-six percent have a definitely yellow pattern. The usual 

 form and color pattern of one of the yellow shells (pi. 7, fig. 12b) has 

 the embryonic whorls cartridge buff; postembryonic whorls ochra- 

 ceous tawny with an impressed sutural band of tawny. Length 

 19.0 mm., greater diameter 12.4 mm., spire height 9.9 mm. An obese 

 shell and a lined form of the yellow pattern (pi. 7, fig. 12c) measures : 

 Length 18.2 mm., greater diameter 13. i mm., spire height 9.5 mm.; 

 last two postembryonic whorls ochraceous tawny streaked with tawny 

 and finely spirally lined with white. Five shells of the yellow pattern 

 lack the typical dark cookci base. One of these (pi. 7, fig. I2d) has 

 the postembryonic whorls light buff, faintly axially streaked or tinted 

 ochraceous tawny; impressed sutural band ochraceous tawny. 



