ANOMA. 5 



bb. Stoutly fusiform, the diam. 3% times the length; 

 profusely striped with brown or corneous-brown 

 on a creamy ground, the streak behind the lip 

 blackish ; columella not truncate ; 20 to 21 x 6 

 mm., whorls iy 2 to 8. A. tesselata, no. 5. 



bbb. Shape similar; striped with corneous-brown on 

 a gray- white ground, and with a gray or black- 

 ish line or band above the suture, and sometimes 

 at the periphery of the last whorl ; 16 x 5.3 mm. 

 with 71/2 whorls to 19x5 mm. with 8%-9y 2 

 whorls. A. t. cinerea, no. 5a. 



aaa. Shell reddish-brown or dull yellowish, darker at 

 the ends; keel strong and acute, white or cream- 

 white. 



b. A brown stripe behind the outer lip from suture 

 to keel, and with a brown band above the creamy 

 keel-band ; smooth, except behind the lip. 



A. nitens, no. 6. 



bb. Aperture angular below; a plum-colored streak 



behind the lip; striae visible nearly to the apex, 



coarse on the last whorl ; 19 x 5.7 mm., with 8% 



whorls. A. prunicolor, no. 7. 



aaaa. Spire pale, uniform. 



b. Shell slender; keel strong and acute. 



c. Pale corneous, obliquely rib-striate, more 

 weakly so above ; basal keel very strong ; aper- 

 ture oblique, angular below; columella not 

 truncate; 18x3.3 mm. with ll 1 /^ whorls, to 

 21 x 4 mm., with 12-16 whorls. 



A. gossei, no. 1. 



cc. Pearl-white, with a pure white keel and lip; 

 coarsely striate at end of the last whorl, else- 

 where with excessively minute striae. 



A. gracilis, no. 3. 



bb. Shell stouter, the diam. not far from a third of 

 the length; spire only faintly striate, very 

 pale, 

 c. Keel high near the lip; clear bluish or por- 



