- IGl - 



loijger and more rcflexcd e'^.[:QS on trio concen-^ric ri"b3 aiicl the 

 is ^iven in' ' ■. James . ' . who 



o ■ 



sueoeedecl llr, Barrett as "Oireetor of the earl;= J-^^naican Siirve^'. 



Oecr-rrence .- Lo^'er Miocene: 3 he-s, BowcLcn, 'Jamaica 



(Guppy, 1866, 1874; Dall, 1907). 



