﻿U. 
  S. 
  NATIONAL 
  MUSEUM 
  

  

  PROCEEDINGS, 
  VOL. 
  44 
  PL. 
  14 
  

  

  Abdominal 
  vertebr/e 
  of 
  Hypopleuron 
  caninum. 
  Dorsal, 
  Ventral, 
  and 
  Lateral 
  Views. 
  

   Natural 
  Size. 
  (Page 
  165.) 
  

  

  