CONTENTS. LI 



m 

 APPENDIX E— Con tinned. Page. 



XXXII. List of the marine alcje of the United SrATES— Continued. 



Used for the manufacture of iodine 717 



The great kelp of California 717 



Alphabetical index 718 



XXXIII. Lecture on the organs of reproduction and the fecundation of fishes and 

 especially of eels. By Dr. Syrski 719 



Introduction 719 



The organs of reproduction and fecundation in fish in general 720 



The reproductive organs of the eel '. 725 



The ovaries of the eel 730 



The spermatic organs 732 



XXXIV. The food and mode of livinc; of the salmon, the trout, and the shad. By D. 

 Barfurth 735 



Prefatory note. By Theo. Gill 735 



Introduction 737 



1. The food of Trutta salar Siebold, (Salmo salar and hamulus Val.,) and Trutta trutta Sie- 

 bold (Fario argenteus Val.) in the river Bhine '. 738 



2. The food of Trutta fario 753 



3. The food of Alausa vulgaris while in the Khino 75? 



Conclusion «•■ 759 



