2 8 LOUIS AGASSIZ. [CHAP. xiv. 



through the liberality of one of the members of the 

 Academy, Dr. Thomas B. Wilson. Agassiz had brought 

 with him his artist Burkharclt and his librarian Hiiber, 

 and both had their hands more than full during their 

 stay, for Agassiz's activity knew no bounds. There 

 were at that time in Philadelphia a number of natu- 

 ralists, the most prominent being Morton, Conrad, Lea, 

 and young Leidy. 



Dr. Samuel George Morton was the most remarkable 

 American naturalist then living ; unhappily, he was an 

 invalid, suffering from a very serious affection of the 

 heart from which he died two years later. Morton was 

 the real founder of invertebrate palaeontology in America. 

 His volume entitled "Synopsis of the Organic Remains 

 of the Cretaceous Group of the United States," 1834, is 

 the starting-point of all palasontological and systematic 

 work on American fossils. His " Crania Americana," 

 1X39, and "Crania /Egyptiaca," 1844, placed him at 

 the head of ethnologists in the Old and New Worlds. 

 It was natural that a friendly understanding should 

 promptly arise between Agassiz and himself, notwith- 

 standing the sad condition of Morton's health. Agassiz 

 became a strong advocate of the doctrine of different 

 species of man ; the word " race " being reserved, and 

 applied only to varieties in each species; and, as a 

 contribution to the ethnological researches of Morton, 

 Agassiz wrote, after Morton's death, his celebrated 

 " Sketch of the Natural Provinces of the Animal World 

 and their Relation to the Different Types of Man," 

 which began the first volume of "Types of Mankind" 

 (1854) dedicated "to the memory of Morton." 



