CONTENTS. 



J- 



Page. 



Introduction 185 



Abdominal viscera 183 



Alimentary tract 187 



Liver 187 



Kidneys 187 



Pancreas 187 



Spleen 187 



Air bladder 187 



Gonads 187 



The peritoneum and supporting membranes of the viscera 187 



Histological structure and embryonic development 187 



The dorsal mesentery of Salmonidse 188 



The ventral mesentery 188 



Structure and development of genital organs of fishes in general 188 



Observations upon ovaries and ovarian membranes of Salmonidae 191 



Oviducts of Salmonidse 194 



Peritoneal membranes, ovaries, and oviducts of Coregonidae 197 



Ovaries, ovarian membranes, and oviducts of smelts 197 



Summary 200 



Relationship of salmonoid fishes, ganoids, and elasmobranchs as indicated by the oviducts 200 



Relation of the anatomical facts to fish-cultural practices 203 



List of works consulted ao6 



184 , 



