Dall and Bartsch The Pyramidellidce. 



Spiral markings consisting of strong striations 

 Summits of the whorls strongly shouldered 

 Subg. Pyrgisculus Monterosato, 1884. 

 Type, Melanin acalaris Phil. 



Summits of the whorls not strongly shouldered 

 Subg. Pyrgiscus Philippi, 1S41. 

 Type, Melania rvfa Phil. 



Spiral markings consisting of one or two strong 

 punctate cords in the intercostal spaces be 

 tween the sutures; whorls slightly shouldered 

 Subg. Pyrgolidium Monterosato, 1884. 

 Type, Pyrgolidium roseum Mont. 



Spiral markings consisting of one or two strong 

 cords; whorls somewhat overhanging 



Subg. Tragula Monterosato, 1884. 



Type, Odostomia fenestrata Fbs. 



Spiral markings consisting of three to six raised 

 threads between the sutures and lirations on the 

 base; whorls strongly shouldered 



Subg. Dunkeria Carpenter, 1857. 



Type, Dunkeria paucilirata Cpr. 



C 2 Axial sculpture consisting of faint riblets 



Spiral markings consisting of strong raised threads 

 Subg. Cingulina A. Adams, 1860. 



Type, Cingulina circinata A. Ads. 



Spiral sculpture consisting of depressed lirations, 

 sculpture granulose 



Subg. Saccoina nom. nov. 



Type, Spica monterosatoi Sacco. 



C :{ Axial sculpture consisting of lines of growth only 

 Spiral markings consisting of many subequally 

 spaced striations; sculpture finely reticulated 

 Subg. Careliopsis Morch, 1874. 



Type, Monoptygma ( Careliopsis} sty- 

 liformis Morch. 



C 4 Axial sculpture absent 



Spiral markings consisting of a broad strong fold 

 at the summit of the whorls, separated from the 

 rest of the whorl by a deep, broad, rounded sulcus 

 Visma subg. nov. 

 Type, Eulimella tenuis Sby. 



