284 proceedings of the academy op [1888^ 



October 16. 

 Rev. H. C. McCooK, D. D., Vice-Presideut, in the chair. 

 Twenty-two persons present. 

 The following papers were presented for publication : — 



"Additional Notes on the Structure and Classification of the 

 Mesozoic Mammalia." By Henry Fairchild Osborn. 



"On the Helicoid Land Mollusks of Bermuda." By H. A.. 

 Pilsbry. 



October 23. 

 Mr. Charles Morris in the chair. 



Twenty-nine persons present. 



The following papers were presented for publication: — 



"Crotalocrinus. Its Structure and Zoological Position." By 

 Charles Wachsmuth and Frank Springer. 



"On a New Species of Starfish of the genus Pteraster." By J. E.. 

 Ives. 



October 30. 

 The President, Dr. Joseph Leidy, in the chair. 

 Fifty persons present. 

 The following papers were presented for publications: — 



"Discovery of the Ventral Structure of Taxocrinus and Hai)lo- 

 crinus and consequeni modifications in the Classification of the 

 Crinoidea." By Charles Wachsmuth and Frank Springer. 



"Observations on the Development of the Skull in Neotoma 

 fuscipes, a contribution to the INIorphology of the Rodentia." By 

 K. W. Shufeldt. 



The following wei'e ordered to be printed: — • 



