1G2 SATURDAY LECTURES. 



sistanco in the preparation of tliis lecture, and to whom the 

 exploration of the sea-bed is chief!}'- due.* 



* Depths of the Sea: C. Wyville Thomson; New York and London, Macmil- 



lan & Co., 1873. 

 Deep-Sea Exploration: a Lecture by J- Gwyn Jeffreys; London, 8vo., Van 



Voorst, 1 88 1. 

 Deep-Sea Sounding and Dredging: C. D. Sigsbee, Lieut. Com. U. S. N., 



Asst. U. S Coast Survey; Washington, Gov't Printing Office, 1880. 

 U. S. Coast Survey Reports, 1867- 1880. 

 Bulletins Museum Comparative Zoology, Cambridge, Mass., Vols. I-IX, 1867- 



1S82. 

 Reports of Jeffreys, Carpenter, Thomson and others in the Proceedings of the 



Royal Society, 1868- 1880. 

 The Norwegian North Atlantic Expedition— Zoology, (etc.) Collett, Koren 



and Danielssen, &c., Christiania, folio, 1880-81. 

 Thalassa, an Essay on the Depth Temperature and Currents of the Ocean, by 



John James Wild; London, Marcus Ward & Co., 1877. 



