CONTENTS. 



PAGE 



Introduction ....... 201 



The Lung of Necturus maculatus (with plates 3-8) . . 203 



The Vascular System op Necturus maculatus (with plates 9-11) 216 



The Brain of Necturus maculatus (with plates 12-13) . 235 



The Epithelium of the Peritoneal Cavity of the Cat (with 



plates 14-15) ....... 245 



