A CONTEIBUTIOX TO THE AXATOMY AND DEVELOPMENT 

 OF THE VENOUS SYSTEM OF CHELONIA. 



BY 



FRANK A. STROMSTEN, 

 Fellow in Biology, Princeton University.^ 



With 12 Text Figures. 



The present series of observations on the anatomy and development 

 of the venous system of turtles was made by the writer in the Morpho- 

 logical Laborator}^ of Princeton University. The material for the adult 

 anatomy has been, for the most part, collected in the neighborhood of 

 Princeton, New Jersey. All of the erabryological material has, through 

 the kindness of Professor IMcClure, been furnished by the Princeton 

 embryological collection. 



I take great pleasure in expressing here my deep obligations to Pro- 

 fessor Charles F. W. McClure for his valuable suggestions and helpful 

 criticism during the preparation of this paper. I am also indebted to 

 Mr. Charles F. Silvester for the preparation of some beautiful corrosions 

 of the veins of the liver. 



METHODS OF INVESTIGATION. 



For the study of the adult venous system, about forty turtles of the 

 more common species were dissected. These included the following 

 forms : 



Chelydpjd.e: Chelydra serpentina (L.). 



K1XOSTERXID.E : Kinosternon pennsylvanicum (Bosc), Aromoclielys 

 odoratus (Latreille). 



Emydid^: Chrysemys picta (Hermann), Clemmys (Chelopus) in- 

 sculpta (LeConte), Chmniys gvtiatus (Schneider), Terrapene Carolina 

 (L.). 



The turtles were killed with chloral hydrate and injected through the 

 left abdominal vein. Chloral hydrate was used in preference to either 

 chloroform or ether because it leaves the animal in an extended con- 



* Presented to the Faculty of Princeton University for the degree of D. Sc. 



AMEUICAN .TOtRXAL OF ANATOMY. VOL. IV. 



