38 STROFHOCHEILUS-DRYPTUS. 



is not easily defined to exclude some species of other sections. The 

 apex is often decollate, in living examples. 



Key to species. 



a. Columellar fold weak, tinted ; spire not more striate than body- 

 whorl. 



6. Surface with faint spiral cords ; spire nor pitted ; outer lip 

 narrow. 



c. Aperture over half the alt. ; fold weak; microscopically 



lineolate vertically, moritzianus ; guerini. 



cc. Aperture half the alt. or less ; fold stronger ; zebra-striped, 



pardalis. 

 bb. Surface wrinkle-striate and granulated; unicolored ; ovate, 



stubeli. 



bbb. Surface of spire pitted ; shell long; lip heavy, wide, brown, 



funcki. 



aa. Columellar fold strong, white ; no spiral cords; spire rib-striate. 

 b. Surface microscopically w-punctate or granulate, 



marmoratus. 

 bb. Surface microscopically irregularly granulate, venesuelensis. 



B. MORITZIANUS Pfeiffer. PI. 21, figs. 46, 47. 



Shell oblong-ovate, solid and strong, imperforate; chestnut-brown, 

 with darker streaks ; surface of latter two whorls closely and somewhat 

 spirally malleated, the malleation especially on the back of last whorl ; 

 with slight growth-wrinkles below suture. Micro-sculpture, an exces- 

 sively fine, dense, longitudinal, vermiculate striolation, hardly visible 

 except on last whorl, the next-to-last whorl with the striolation more 

 confused, but not regularly granulate. Whorls remaining 5, the 

 apex being lost by erosion or truncation, and plugged. Earlier 

 whorls generally with more or less zigzag, Achatina-like marking. 



Aperture decidedly over half the shell's length, dark bluish in- 

 side ; peristome buff, expanded, thick; columella buff, spreading 

 above, with a distinct entering fold. Parietal callus rather thin, 

 transparent- whitish. 



Alt. 90, diam. 42, alt. aperture 47 mill. 



Alt. 91, diam. 48, alt. aperture 52 mill. 



Alt. 81, diam. 45, alt. aperture 46 mill. 



Alt. 60, diam. 33, alt. aperture 35 mill. 



Alt. 54, diam. 30, alt. aperture 33 mill. 



Caracas, and Province Tritxillo, Venezuela; Pamplona U. S. of 

 Colombia; Punamarca, Peru. 



