146 dactylinj:. 



lineolata, Gray. pura, Reeve. 



micans, Soland. purpurata, Sivains. 



minuta, Link. rosolina, Duclos. 



mitreola, Duclos. rufifasciata, Reeve. 



monilifera, Reeve. strigata, Reeve. 



myriadina, Duclos. Tehuelcliana, D'Orh. 



nitidula, Soland. tergina, Duclos. 



oryza, Lam. triticea, Duclos. 



parvula, Mart. undatella, Lam. 



pellucida, Reeve. zanoeta, Duclos. 



Puelchaiia, D'Orb. zonalis, Lam. 

 pulchella, Duclos. 



Sub-gen. dactylidia, H. and A. Adams. 



Spire obtuse, covered with a thick deposit of enamel ; aperture 

 narrow, plicate ; inner lip with a large, thickened callus, pro- 

 duced at the hind part, and covering and concealing the spire. 



millepunctata, Duclos. nana. Lam. 



mutica, Say. 



Sub-gen. callianax, H. and A. Adams (Olivina, Morch, 



not DVrh.). 



Shell not polished ; spire produced, acute, suture channelled ; 

 aperture wide, effuse in front ; callus of inner lip thick, defined ; 

 columella simple, or with a few plaits anteriorly. 



biplicata, Sow. semistriata. Gray. 



columellaris. Sow. zenopira, Duclos. 



Sub-gen. lampeodoma, Swainson. 



Spire acuminate, elevated, suture canaliculated ; inner lip 

 simple posteriorly, regularly and closely plicate at the fore part 

 of the columella ; callus moderate, restricted. 



leucozonias, Gray. volutella. Lam. 



