L AMELLIBRANCHI ATA . 



142 



No. 647. Ostrea frons, Parkinson. 



From the Lower Chalk, Royan, France, and now in the private Geological 

 Cabinet of Mr. Ward, Rochester. Two specimens. Price, $1.00. 



No. 648. Ostrea Santonensis, D'Orb. 



From the same locality as the preceding, and now in the Ward Museum, 

 University of Rochester. Size, 6x4. Price, $0.80. 



No. 649. Ostrea Santonensis, D'Orb. 



From the same locality as the preceding, and now in the private Geological 

 Cabinet of Mr. Ward, Rochester. Price, $1.00. 



No. 650. G-ryphea arcuata, Lam. 



From the Lias, Semur, France, and now in the 

 Ward Museum, University of Rochester. Two speci- 

 mens. Price, $0.60. 



No. 651. Exogyra columba, Goidf. 



From the Lower Cretaceous, Boussa. France, and now in the Ward Museum, 

 University of Rochester. Price, $0.60. 



NO. 652. Exogyra COStata, Morton. 



From the Cretaceous beds of Perry Co., Alabama, and 'now in the private. 

 Geological Cabinet of Mr. Ward, Rochester. Price, $0.00. 



No. 653. Janira Neocomiensis, D'Orb. 



From the Lower Ncocomian (Cretaceous), Auxerre, 

 France, and now in the Ward Museum, University of 

 Rochester. On slab. Price, $0.40, 



No. 654. Lima gigantea, Sow. 



From the Lias, Lyme-Regis, England, and now in the Ward Museum, Uni- 

 versity of Rochester. Price, $0.60. 



No. 655. Hippurites radiosa, Desmouiins. 



The Hippuritidce, to which family this and the six succeed- 

 ing forms belong, are (says Woodward), the most problematic 

 of all fossils. They are characteristic of the cretaceous strata, 

 and have an unequivalved, unsymmetrical shell, with two 

 muscular impressions. This specimen, showing both valves, is 

 from the Lower Chalk, Dordogne, France, and is now in the 

 Ward Museum, University of Rochester. 



Size, 6x4. Price, $1.50. 



No. 656. Hippurites radiosa, Desm. 



Lower value. From the same locality as the preeeding. 



Price, $0.80. 



