6. Models of Extinct Vertebrates by Chas. Knight, 



cast by Jacob Gommel. Exhibited by the Department 

 of Vertebrate Palaeontology, American Museum of Natu- 

 ral History. 



7. Series of Exhibits by Dr. Chas. R. Eastman, of Harvard 



University. 



a. Fin of new species of Cladodont Shark, from the Hamil- 

 ton group, near Buffalo, N. Y. 



b. Photograph of Egg of Ostrich, Struthiollthiis cherson- 

 cnsis^ Brandt., from superficial (Pleistocene) deposits, 

 northern China. 



c. Photograph showing variation in Dental Plates of the 

 Chimaeroid, Ptyctodes calcolus N. & W., from the 

 Devonian of Iowa. 



d. Photograph of the remarkable Psammodont-Cochlio- 

 dont-Lung-fish, Syiithetodus. From the Upper De- 

 vonian (State Qiiarrv) Fish-bed, Johnson Co., Iowa. 



S. Exhibit in Paleobotany by Mr. Arthur Hollick, of De- 

 partment of Geology, of Columbia University. 



a. Fossil Plants from the Middle Cretaceous clays of Block 

 Island, R. I. 



b. Samples of the Plant Bearing Basal clays. Middle Cre- 

 taceous, and the Superficial Bowlder-clays, Glacial, of 

 Block Island, R. I. 



c. A new fossil Palm from the Yellow Gravel (Miocene .^) 

 of Bridgeton, N. J. 



9. New Fossil Fungi, Preserved in Silicified Wood and 

 Exhibited under the Microscope, by Dr. A. A. Ju- 



lien. Department of Geology, Columbia University. 

 a. In wood of the Petrified Forest, at Chalcedony Park, 

 Arizona. 



1 . Silicified fungus-spore, in act of sprouting. 



2. Silicified bacteria. A chain of bacilli crossing lim- 

 pid quartz. 



3. Silicified mycelium, branching along the walls of 

 the wood-cells, and secreting iron-oxide. 



