Published in Biological Bulletin, in 1909, in volume 16, pages 239-245

Created: 2011-06-04, modified: 2017-01-06

Published in The Auk, in 1905, in volume 22, pages 146-158

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1905, in volume 22, pages 273-288

Created: 2013-03-08, modified: 2013-03-08

Published in The Auk, in 1904, in volume 21, pages 463-471

Created: 2013-03-07, modified: 2013-03-08

Published in Proceedings of The American Philosophical Society, in 1912, in volume 51, issue 205, pages 191-200

Created: 2017-01-01, modified: 2017-01-01

Published in Biol Bull, in 1919, in volume 37, pages 222-245

Created: 2010-01-06, modified: 2011-06-21