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00-ui\KIA LOIuOlTLA n. sp» 



Desorj-ption .- Shell soall, suborbicixlar, weakly inflated; more 

 produced siid more convesly roimded anteriorly"; lunlDO Ioy/, acube; 

 limule narrov;, moderatels? impressed; external siirface seulptitred 

 with about thirt37-t:vo strong radials of inconstant r:idfh, separat- 

 ed "by narrov/er interspaces; the rihs vath relatively coarse nod- 

 ules arranged along usually eq^ially spaced con-:? entric lines, the 

 nodules heconing compressed .■^•i''.d sharker toward either end; right 

 valve 'vTith tro cardinals, the posterior larger and obscurely bifid, 

 and an anterior and posterior lateral, the posterior somewhat 

 obscured by the lig-ament ; inner margin of the valve feebly crenu- 

 laterl; the interior with obscure radial markings. 



D intensions .- Lat., 14 ram.; aLt., 13 mm.; semidiam., 2,5 rr.i. 



Remarks .- G_. lo^nonea is known from a single ri ^'>t v-^ve. 

 It is characterized by its strong sailptTire, both the radial 

 and the concentric nodules beiag sharply chiseled. The radials 

 pre slightly inconstant in width, osriecially tn ■■■■•rd either end, 

 The sculpture is unsually strong for the section Jodakia s. s , , 

 but the shell is larger and more cora^jressed than the average 

 Jagonia . 



Occurrence.- Lower Iliocene : Bowden beds, Bowden, Jamaica. 



