52 
WILLIAM KEITH BROOKS 
The homologies of the muscles of the subgenus Cyclosalpa. Johns Hopkins Uni- 
versity Circulars, 195, March, 1907, pp. 1-2. 
The foundations of zoology (2d. ed.) Macmillan Co., New York, 1907. 
1908 
Biographical memoir of Alpheus Hyatt. Biographical Memoirs, National Acad. 
Sci., vol. 6, 1908. 
The origin of the lung of AmpuUaria. Carnegie Institution of Washington, Pub. 
102, 1908, .pp. 95-104, pis. 1-7. (With Bartgis McGlone.) 
The pelagic Tunicata of the Gulf-Stream; Parts 2. 3, and 4: 'On Salpa floridana, 
the subgenus Cyclosalpa, and on Oikopleura tortugensis, sp. nov. Carnegie 
Institution of Washington, Pub. 102, pp. 73-94, pis. 1-8. (4 with Carl Kellner), 
The province of science. Popular Science Monthly, 1908, pp. 268-271. 
1909 
Are heredity and variation facts? Address at 7th International Zoological Con- 
gress, Boston, 1907; also reprinted as a memorial publication. 
UNPUBLISHED WORKS 
The axis of symmetry of the ovarian egg of the oyster. In press 1905, but still in 
MS., not published. 
An extensive work on Salpa. 
Lowell Lectures. 
