PROCEEDINGS 



OF THE 



American Philosophical Society 



HELD AT PHILADELPHIA 



FOR PROMOTING USEFUL KNOWLEDGE 

 Vol. LVI, 1917. No. 7. 



CONTENTS 



PAGB 



A Description of a New Photographic Transit Instrument. By Frank Schlesinger . . . 484 



Studies of Inheritance in Pis«m. By Orland E. White 487 



Ecology and Physiology of the Red Mangrove. By H. H. M. Bowman 589 



Eighteen New Species of Fishes from Northwestern South America. By Carl II. 



Etgenmann 673 



Descriptions of Sixteen New Species of Pygidiidse, By Carl H. Eigenmann 690 



Minutes xiii 



Index \-\! 



Title Page and Contents 



PHILADELPHIA 



THE AMERICAN PHILOSOPHICAL SOCIETY 



104 South Fifth Street 



1917 



