Zoologischer Anzeiger 



herausgegeben 



von Prof. J. Victor CarUS in Leipzig. 



Zugleich 



Organ der Deutschen Zoologischen Gesellschaft, 



Verlag von Wilhelm Engelmann in Leipzig. 



XXI. Band. 26. September 1898. No. 569. 



Inhalt: I. Wissenschaftl. Mittheilnngen. 1. Brown, Do Salmon feed in Fresli Water? 

 The Question as viewed from the Histological Characters of the Gut. 2. Piersig, Nene Hydrachniden- 

 formen aus dem sächsischen Erzgebirge. 3. Ludwig, Eine vergessene Holothurie. 4. Hamann, 

 Mittheilungen zur Kenntnis der Höhlenfauna. 11. Mittheil, ans Museen, luHtituten etc. 

 70. Tersammlung deutscher Naturforscher und Ärzte. III. Personal-Notizen. Notice. Change 

 of Address. Litteratnr. p. 361—376. 



I. Wissenschaftliche Mittheilungen. 



1. Do Salmon feed in Fresh Water? The Question as viewed from the 

 Histological Characters of the Gut. 



By Alex. Brown, M.B., D.Sc, M.A., Lecturer in Zoology, University of Aberdeen. 



(Schluß.) 



The material upon which I have had the opportunity of working 

 was obtained from the rivers Dee and Don in Aberdeenshire and from 

 the neighbouring Coast. At considerable trouble, specimens were 

 procured at different parts of the rivers, at all seasons, and with the 

 genital organs in various stages in development. My observations were 

 commenced in the middle of the year 1895, and extended over the two 

 following years. 



For convenience in description, I shall for the most part contrast 

 the characters of the gut in salmon, which are feeding actively in the 

 sea and whose genital organs are in an early stage of development, 

 with those in salmon which have been in the river for some time, 

 and whose genital products have almost matured. By this method the 

 changes in the structural characters of the gut will become most 

 apparent. 



1) The General Appearance of the Digestive Organs. 



From the distended comparatively thin -walled organ found in 

 the salmon in the sea, the stomach of the river salmon becomes 



36 



