40 



Appendices to Second Annual Report 



the liver, to the nature of the food, period of digestion, maturation of the 

 reproductive products, and other conditions. 



As in the herring and cod, the stomach of the haddock contains pepsin, 

 which actively digests fibrin in the presence of dilute hydrochloric 

 acid. I obtained a peptic extract both from the cardiac and pyloric ends 

 of the stomach, the former being the more powerful. 



The pyloric appendages, like those of the fishes just mentioned, also 

 contain trypsin, while the bile contains a diastatic ferment. 



Its stomach yields pepsin — its bile contains a diastatic ferment. From 

 the watery extract of the liver I obtained a considerable amount of gly- 

 cogen and abundant evidence of sugar. The skate is specially interesting, 

 as it possesses a well-developed pancreas. 



I have made a number of observations on the structure and functions 

 of the pancreas, and also upon other organs which I regard as represent- 

 ing the pancreas in other fishes ; but I hope to make this the subject of a 



THE HADDOCK. 



THE SKATE. 



