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Among Gabb's acuta are some forms which are larger than pel tell a . 

 more elongated and attenuated posteriorly and have a more concave 

 posterior dorsal margin and more convex base; they probably should 

 be seoarated from the other forms which resemble the Bowden peltella . 



Occurrence .- Oligocene, Santo Domingo. (Gabb, 1875) 

 loi^.'er Miocene: Bowden beds, Bowden, Jamaica. (Ball, 1898) 



