SHUMARD AND SWALLOW—NEW FOSSILS. 211 
post fine, ork ore: waved lines, which are crossed by numer- 
ous irregular, flexuous, yard prominent, rad iating strie. 
Diveansions A youn and ae perio specimen gives 
pi erg 825 Oy: for the length, 
Loc.—Found by nisi, F. Hawn in the Upper 
Coal M a unison of the valley of the Verdigris River, K. T. 
AvicuLa SHAWNEENSIS, Shumard. 
Shell very inequilateral, subtrigonal, lingueform, oblique, 
curved, height much greater than the length; buceal and pal- 
? 
gin and yer nearest the anterior extremity; posterio. 
; any 
of the specimens under examination; we can only detect fine 
concentric strize - Saiedes on some nts. 
m beak to posterior inferior extremity, 66; 
thickness ot valve 13; length of cardinal margin, . 
Geol. Pos. and Loe.—Disco eed by Major Hawn at Clifton 
ae Ter., in Upper Coal Miaanaee 
Mrs Orrawaxssis, Shumard. ad : . 
