Interesting Works on Natural History. 



Spry's Cruise of the "Challenger" 



The Cruise of Her Majesty's Ship "Challenger." Voyages over 

 many Seas, Scenes in many Lands. By W. J. J. SPRY, R.N. With 

 Map and Illustrations. Crown 8vo, Cloth, $2 00. 



Thomson's Voyage of the " Challenger" 



The Voyage of the "Challenger." The Atlantic: An Account of 

 the General Results of the Voyage during the Year 1873 and the 

 Early Part of the Year 1876. By Sir C. WYVILLE THOMSON, F.R.S. 

 With a Portrait of the Author, Colored Maps, Temperature Charts, 

 and Illustrations. 2 vols., 8vo, Cloth, $12 00. 



Wallace 's Island Life. 



Island Life; or, The Phenomena of Insular Faunas and Floras, 

 with their Causes. Including an entire revision of the Problem of 

 Geological Climates. By ALFRED RUSSEL WALLACE. With Illus- 

 trations and Maps. 8vo, Cloth. (In Press.) 



Wallace's Malay Archipelago. 



The Malay Archipelago : the Land of the Orang-Utan and the Bird 

 of Paradise. A Narrative of Travel, 1854-'62. With Studies of Man 

 and Nature. By ALFRED RUSSEL WALLACE. With Maps and nu- 

 merous Illustrations. Crown 8vo, Cloth, $2 50. 



Wallace's Geographical Distribution of Animals. 



The Geographical Distribution of Animals. With a Study of the 

 Relations of Living and Extinct Faunas, as Elucidating the Past 

 Changes of the Earth's Surface. By ALFRED RUSSEL WALLACE. 

 With Colored Maps and numerous Illustrations. 2 vols., 8vo, Cloth, 



$10 00. 



