- lf^2 - 



puzzling form are present. I"^ oertainly is not a tj^pical "^osguI- 

 arca and probably should be referred to a new section. The umbo 

 is almost anteri-^r in position, so tliat the shell is very inequi- 

 lateral, "our anterior and five posterior teeth are present, and 

 in both series the teeth, are more closely spaced than in the spec- 

 imen figure -1 by Dall. 



Ocourrence.- Lo-z/er Miocene: Bowden beds, Bowden, Jamaica. 



