1897.] NEW YOKK ACADEMY OF SCIENCES. 151 



Biological Section. 



February 8th, 189t. 



Dr. J. G. Curtis in the chair. Thirt3'-five persons precent. 



Mr. A. A. Tyler read a paper on : "The Nature and Origin of 

 Stipules," The paper was prefaced by a brief review of the lit- 

 erature on the subject of stipules, and dealt with their nature 

 and origin in the light of geological, morphological, anatomical 

 and developmental evidence. The paper appears in full in Vol- 

 ume X. of the Annals. 



Mr. G. N. Calkins presented the results of his investigations 

 on : " The Tetrad Formation in Plants." 



Prof. C. L. Bristol read a paper on " The' Giant Cells in the 

 Nervous System in Nephelis." The paper was preliminary to a 

 farther discussion of the Nervous System of this leech, and in 

 it was brought out the coordination of these cells and their rela- 

 tions to the central and peripheral nerve systems. 



On account of the lateness of the hour the remainder of the 

 programme was deferred till the next meeting. 



The election of section officers was made a special order for 

 the next meeting. 



C. L. Bristol, 



Sec7-etary. 



