CONCHYLIA— D/THYi?^. 



19. Kellia. 



1. suborbicularis, subrotunda, (equilateralis, alba. 



roundish, equilateral, and white. 



2. rubra, ovata, in<squilateralis, rubra, 



oval, inequilateral, and red; 



20. MoNTACUTA. 



1. substriata, costulis longitudinalibus obscuris. 



with obscure longitudinal ribs. 



2. bidentata, dente altera obliquo cochleariformi. 



one of the teeth oblique and spoon-shaped. 



3. ferruginosa, dente altera injlexo concavo. 



one of the teeth inflected and concave. 



4. oblonga, dentibus erectis. 



with all the teeth erect. 



21. Lepton. 



1. squamosum, squamoso-punctatum. 



punctured in a scale-like manner. 



2. nitidum, substriatum nitidum. 



slightly striate and glossy. 



22, LUTRARIA. 



1. oblonga, latere antico truncato. 



truncate at the anterior end. 

 ♦C 



