;9i - 



2. bowdenr-nsic is chavactr-rized "bj^ ^' 11 size, convesitj;, 



suhequila-' ' "' ' ■ " ■■ - '- - . . ^ 



eparate it from the associate ^ p: irp'o^/i . The Qhipola 

 0. triangulatus j-.ll (l) is less inflated, hig-her, and its sonlp- 



(1). lo.G. ait., pv, 1476-1477, pi. 49, fig. 16, 1905. 



tiire is weaker an'"! more irregular, while on, 0_. tanious .Dall (2) 



of the Oak C-rove fauna, the low ooncentric undulations are obsolete 



(2). I ^ ::-;;, p. 1477, pi. 49, fi". 11. 



on the ventr^J. half of fm- ohell. Trpioal forms of the recent 

 West Indian 0_. niartinicensis rVOrbigny (5) are snaller, more 



(P). loo. cit., . '38, pi. ."7, figs. 21-23, 1853. 



compressed and the sculpture more uniform. 



Occurrenoe . - L a:? e r M io c ene : 3 ow d en h e d s , 3 o w^ en. Jama i ca 

 (Dan , 1903). 



