- 7>7'1 - 



vei- than the posterior. 



Remarks .- A few valves of this readily reoopnize^, 'fomi 



ere present. I' ' jharacterized "by its delicv' , 'Lstaat son- 

 centric seulptiire aad weak, niinerous radial s that rather abrupt- 

 ly <?han~e their rlireetion anteriorly and posteriorly, O'-ir-- ^ e" 

 ed upward. Some of the valves are more elongated trarisvercely 

 thf^-. the one represented by Dallas figure. 



OGQu.rrenge.- Lower Kiocene : 3ov;den beds. Bow den, Jamaica 

 (Lall, 19CS). 



