372 ANNALS NEW YORE ACADEMY OF SCIENCES 



The following programme was then offered: 



R. D. 0. Johnson, Note on the Habits of the Climbing Cat- 

 fish (Arges marmoratus) from the United 

 States of Colombia. (Bead in abstract by 

 the Secretary.) 



Bashford Dean, On the Changes in the Behavior of the 



Eel (Conger malabaricus) during its Trans- 

 formation. 



Bashford Dean, Do Developing Embryos Give Eeal Clues as 



to Lines of Descent? 



William K. Gregory, Notes on Certain Principles of Quadrupedal 



Locomotion and on the Mechanism of the 

 Limbs of Hoofed Animals. 



F. F. Hahn, On the Dictyonema Fauna of Navy Island, 



New Brunswick. (Eead by title.) 



Summary of Papers. 



Mr. Johnson's paper is published as pages 327-333 of this volume. 



Professor Dean said in abstract : When at Misaki, Japan, the speaker 

 had made observations upon the structure and behavior of a living 

 leptocephalus larva which was kept alive in an aquarium for over three 

 weeks, during this time undergoing its metamorphosis. Especially in- 

 teresting is the rapidity with which the behavior of the young eel changes 

 from day to day in its methods of swimming and resting, response to 

 stimuli, etc. The speaker suggested that these marked differences in be- 

 havior in successive stages were correlated with kaleidoscopic changes in 

 elements of the central nervous system ; that when more fully known this 

 would probably afford a suggestive case of parallelism between psychic 

 reactions and neurological conditions. The paper was illustrated by 

 drawings and diagrams. 



Professor Dean in his second paper said in abstract : After reviewing 

 the history of the question and touching upon the modern reaction 

 against the extreme views of Haeckel the speaker endeavored to show 

 that a comprehensive study of the anatomy and embryology of ganoid 

 and teleost fishes in the light of paleontological data gave strong evidence 

 in the affirmative. 



The Secretary gave an abstract of a communication from Dr. P. 

 Bachmetjew, of Sofia, relating to the physiology of "Vesperugo pipi- 

 strelhis" and "Miniopterus schreibersii." In some cases these bats 



