582 THE AMERICAN NATURALIST [Vol. LXXX 



history and embryology have been more thoroughly and 

 successfully studied. These studies, together with those 

 on Amblystoma and Neeturus, comprise the major inter- 

 est of the first period of his scientific activities. 



The second period of Smith's productive scientific work 

 began shortly after the death (December 6, 1928) of his 

 teacher at Columbia, Dr. Bashford Dean. An organiza- 

 tion of Dr. Dean's associates, students, friends and fam- 

 ily was set up to establish memorials to him. Bronze 

 plaques were cast and mounted in the American and 

 Metropolitan Museums. Then came the question of what 

 to do with four sets of splendid drawings (some in color) 

 of certain archaic fishes — myxinoids and sharks — made 

 for reproduction by lithography, and it was decided that 

 these should be published as a Memorial Atlas under the 

 direction of Dr. Smith and the writer (as editor). 



After much thought, I determined that, instead of a 

 Memorial Atlas, we would publish a Memorial Volume 

 if I could have Smith's heljo, since his training in embry- 

 ology and anatomy would be invaluable. And when next 

 he came to my office, I announced my proposed plan and 

 without a moment's hesitation he held out his hand and 

 said — "I came to tell you just that thing. I, too, owe it 

 to Dr. Dean. ' ' Nothing more clearly illustrates the spirit 

 of the man. Then began work that covered 13 years and 

 in which we did five of the eight articles in the volume. 

 This was especially hard for Smith, who was carrying a 

 full teaching load in the department of anatomy of New 

 York University Medical College. Furthermore, it was 

 time-consuming for him to come to and return from the 

 American Museum. But for all that — he came. 



In 1931 and 1933, we published two joint papers — one 

 on the natural history of the frilled shark. Then came 

 the long hard pull for more than three years in which 

 Smith prepared his great "Anatomy of the Frilled Shark, 

 Clilamydoselaclius anguineus," (published 1937) of 190 

 quarto pages, 7 half-tone plates and 128 text-figures. In 

 shark anatomy this book, on one shark only, measures up 



