384 irossiL ostreid^e of north America. 



PLATE LIX. 



OsTREA GLABRA Meek & Hayden. (Page 307.) 



Figs. 1,2. — Exterior and iuterior views of an upper valve. 



3, 4. — Similar views of the lower valve of the type specimen of O. ineeouri$ 

 White. 

 5. — Upper view of the type specimen of 0. arcuaiilis Meek. 



