- 411 - 



straighter, the posteriu- ■-- not au ''je;.:a^ iiiciued, '-'' jo 



-.arrovrer : ""•^ ' , er and the ilbs 



narrower. -h? e 3ligh'" :e to the admittedly 



variah]. f riuediun. , 'LL-i-'e .u.- -. Torxi: that lihov; 



the same oharaaters as the Bo'^^deii s-peciinens. 



Oocurrenoc .- Lower I.Iiocene : 3a:/ den oecls, 3ov/den, '^'rciaica 

 (Dall, 1900). I.Iiocene: . ar^'-'s forrnati , 'Dall, 1' 



■lenn, 1904\ . Tin forr;.ati . : , " ■• , fLa^l, 1000). 



Pliocene: ./ao •_ ' ' , . "" ' ' , "-s.); 



Oaloosahatchie marl, 'Florida (liall, 1900). 'ii':: 3-^:e 



TiOo''cout to S,. _, 'arta, 3razil in --lan "0 , _ cer)t 



off West Inci.ie;i " 't occin's in botia olialloj^ a: p -.vater. 





¥^ 



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