Alexander. — More About the Paddle-Fish 39 



crustaceae (copepods and the like), filamentous algae, 

 cyst-like bodies (probably protozoa or spores of 

 algae) . 



Duodenum (small intestine), two inches long. Receives 

 ducts of liver and pancreas and in addition, the duct 

 of the appendices pyloricae. The latter are confluent 

 in this species, into a single large, lobose diverticulum 

 which opens by a single duct near the pyloric valve. 

 It contained some of the same contents as the duode- 

 num. It has doubtless been formed, phylogenetically, 

 by several smaller pyloric caeca becoming confluent 

 at the base. 



Colon (large intestine), four inches long. Possesses a 

 well developed spiral valve. 



