RKCOKDS. 255 



By previous ;ii r;m;4cnicnt ihc discussinn was opened in the 

 loilowiuy; inaniier : — 



(i.) Mr. Tlioiiias AJcehan j^resented the evidence derived from 

 the stiulv of plants. 



(2.) Prof. J. P. AIcMnrricii presented that derived from the 

 stiuly of invertebrates. 



(3.) Dr. J. A. Allen presented that derived from the study 

 of recent vertebrates. 



(4.) Prof. E. D. Cope presented that derived from the study 

 of fossil forms. 



When the question was thrown open, some iifteen members 

 availed themselves of the opportunity to speak on the topic, and 

 the discussion continued until 1.30 P.M., when the Society 

 adjourned for lunch. 



AFTERNOON SESSION, 3 P.M. 



President Rice in the chair. 



Twenty members present. 



The following motion was introduced by Professor Ma- 



closkie : — 



Resolved^ That the thanks of the Society be tendered to 



I. The Philadelphia Academy of Natural Sciences, for the 

 generous use of their hall. 



3. To the officers and members of the Art Club for their hos- 

 pitable invitation. 



3. To the authorities of Bryn Mawr College, of Ilaverford 

 College, of Swarthmore College, of the University of Pennsyl- 

 vania, and to the Committee of Reception in connection with the 

 American Association for the Extension of University Teaching, 

 for their kind invitation to their reception proffered to the mem- 

 bers of this Society. 



This motion was unanimously adopted. 



It was voted to leave the determination of the time and place 

 of the next meeting with the Executive Committee. 



The following reports on Scientific Expeditions were then 

 made : — 



