vaughani reoreGents e -'-• -'--^ ^^jalrnovvn from "bed;. ie-:- than Plio- 



cene. ?he two sr.ecies of grotocariHa closelj' reaemble oertain 

 Recent .Vest Indian f orciG . 



The Veneridae also •'ii-'-^l- ^> nnnt--^ n-r i ■.■'.-.-. -r- Tertiarv 

 elements. Tivela janiaioenGiR la fclie onlT>' re ;a*e;:,exifca.tive of the 

 geniiG recorded from American Tertiary l^eds and the Recent "afrar- 

 ium (Goaldia) insizlare has not "been reeogniz^'-" ■:=■': anj? other 

 Tertiary; horizon. The single Gyclinella is ver;^ close to a Re- 

 cent epecies. Oh i one L-awlrinsi is closelj? allied to the Duplin 

 crihraria . The genvsi Para.i3tarte , itare-orded from a ;)re-^/Ioaelle 

 horizon, if represented bj- a specie;" that can scarcely be sep- 

 arated from the !.'i"cene to Recent type of the gemiG , P. triouetra . 

 A imique form is believed to represent a nev^ section of the genus 

 Gooperella , which in Its typical form fir,;.t a.roears in the 

 Duplin. 



The Tel] Liiao proper are an almost strictly i.,L^digenous 

 group, only two of the fifteen species having- an ej:tra-Bov;den 

 distribution, without arty striding relations. Three species are 

 representatives of groups that per.. 1._l; from the Alum Bl"--;^ -^cMusiS 

 to the Recent. The other Tellinacea, however, present some im- 

 expected features, including the initiation of the section 

 Gymatoica of the genus I\lac ..' ^-^ . recei/c .^ .r Lgilla - ■ c, Semele 

 tliat is surprisingly close to the Pliocene and Recent bellastriata . 



The Ghipolan elenents in the faima are relati^-ely num- 

 erous and not v/ithout significance. Of the thirteen species that 

 are eo Tiion to the two faunas eight are long-ranging and there- 



