1904 
1904 
1904 
1906 
1906 
1907 
BIOGRAPHICAL SKETCH lxxvli 
Natural history work at the Marine Biological Laboratory, Woods Hole. 
Science, vol. 138, pp. 538-540. 
Hybrids from wild species of pigeons crossed inter se and with domestic 
races. Research Seminar, M. B. L., Biol. Bull., vol. 6, pp. 315-316. 
The origin and relationship of the rock pigeons as revealed in their color- 
patterns. Biol. Bull. vol. 6. pp. 307-308. 
The problem of the origin of species. Congress of Arts and Sciences, St. 
Louis Exposition, 1904, Boston, vol. 5, pp. 41-58. 
The origin of species. The introduction and abstract of a lecture delivered 
before the Nat. Hist. Soc. December 20, 1906. Bull. Wis. Nat. Hist. Soc. 
vol. 5, pp. 6-14. 
Cheques and bars in pigeons and the direction of evolution. Agricultural 
Magazine, vol. 5, no. 6, pp. 174-182. 
