Since this species is the oiHi' aQmbor ox' t ne aectioii Lt is 

 conspicuocis for its Q-olirae ?tria.tions, v/hich raa;;, bov/ever, 

 he Q'lite 'I'bscure. 



Qooarrerics ,- "pper Oil. e: Santo Domingo (Dall, 19'~*0) ; 



lower Miocene : Bowden heris, ^.ov,':'en, Ja;..aiGa ("Dall, 



1900). 



