350 FOSSIL OSTREID^ OF NORTH AMERICA. 



PLATE XLII. 



OsTREA soLENiscus Meek. (Page 300.) 



Fig. 1. — Upper vie-w of a small example; natural size. Fully adult examples are 

 fully twice as long as tliis. 



OsTREA (alectryonia) LARVA Lamarck. (P.age296.) 



2-9. — Views of different examples, showing the wide variation of size and orna- 

 mentation. All natural size. 



