JJall and BarUvli—TJic riir<n)ii<leUklm. 5 



Shell inarktHl by slroii^- spiral keels and weak axial 

 rib lots 



Calluion^ichseus subg. nov. 



Type, Pyramidellajamaicends Dall. 



Periphory not sulcate 



Shell marked by strong- axial ribs, intercostal spaces 

 strongly spirally striated, aperture auricular 

 Subg. Otopleura Fischer, 1SS5. 



Type, Fyramidelid aitru-cati Chem. 



Basal cords present 



Shell marked by strong spiral ridges, moderately 

 strong axial ribs and two basal cords 

 Subg. Triptychus M.'.rch, 1875. 



Type, TriptycJius nhevs Murch. 



A- C'olumellar folds two 

 Shell umbilicated 



Surface polished, marked by very fine lines of growth and mic- 

 roscopic spiral striations 



Subg. Tiberia Monterosato, 1875. 



Type, Pyramidella nitidula A. Ads. 



Surface polished, marked by fine lines of growth and strong 

 spiral striations 



Ulfa subg. nov. 



Type, Pyramidella (Ulfa) cossmanni nom. 

 nov. = Syrnola striata Cossmann. 



Surface marked by strong axial ribs, intercostal spaces spirally 

 pitted; early po.st-nuclear whorls sculptured differently from 

 the later ones 



Tropseas subg. nov. 



Type, Pyramidella subulata A. Ads. 



Shell not umbilicated 



Surface polished, marked by very faint lines of growth and 

 microscopic spiral striations 

 Basal fascicle present 



Vagna subg. nov. 



Type, Pyramidella paumotensis Tryon. 



Basal fascicle absent 



Subg. Eulimella Forbes, 1846. 



Type, Eulimella crassnla Fbs., ^=E. scilla 



Scacchi. 



