(EULO?IA) 030IJTA n. 



Desci-iptioi: .- 3hell of mecliuni size, thin, STxoennilateral, 

 '•:ell iiiflatec^ ; '>'^-'.''-e"''0-'^.or sal rnargin excavated, po;/ - lorsal 

 almost straight, sloping gently, meeting the vertically trimcat- 

 ?■■! postero-latersi margin at an angle of abont 1"0*^; roimcTed 

 ventrally and anteriorly: nmhohes low; Ivinule small, feebly im- 

 pressed, cordate; posterior area poorly define':''; e"ternaj sur- - 

 face sculptured with fine, thin, elevated concentrio lines, erod- 

 ed from much of the surface, and faint su^ges-^-^' '-^ • ^' o-^ -^ine radials ' 

 of varying width; hinge weak; inner margin of the v-lve entire. 

 Dimensions .- lat., 8 mm.; alt., 7,5 ram.; semidiam. , 2 rnn, 

 Hemarj:o .- -i^^is species is described from one ri^ht valve. 

 The radial sculpture is very feeble and toward either end is ob- 

 scurely divergent in a mar^ rmewhat similar to 1.. furcata . From 

 that species oronta differs by its — "--J^er cor-vesity, closer con- 

 centric lines, weaker and finer radials, wider but shorter lunula 

 and the absence of an escutcheon. Because of the feebleness of 

 the radial sculpture oronta may be confused with ^. limoniana , but 

 the new species is more inflate"', with a wider and shallower luji- 

 ule and much less conspicuous concentric scTilpture. 



Occurrenc" .- lov/er I'.iocene : Bowden beds. Bo. ' , Jamaica. 



