CONTENTS. 



PAGE 



Introduction . . . . • , • • 201 



T he Lung o f Necturus maculatus (with plates 3-8) . . 203 



The Vascular System op Necturua inaculatus (with plates 9-11) 216 



Thb Bra in of Nec turus maculatu s (with plates 12-13) . 235 



The Epithelium of the Peritoneal Cavity of the Cat (with '^"^!f 



plates 14-15) 246 



