Published in Biol. Bull, in 1902, in volume 3, pages 3-14

Published in Biological Bulletin, in 1902, in volume 3, pages 16-26

Published in Biol Bull, in 1902, in volume 3, pages 115-131

Published in Biol Bull, in 1902, in volume 3, pages 165-171

Published in Biological Bulletin (Woods Hole), in 1902, in volume 3, pages 181-191

Published in Biol Bull, in 1902, in volume 3, pages 235-240

Published in Biol Bull, in 1902, in volume 3, pages 262-288