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 Biol Bull, in 1902, in volume 3, pages 235-240
Published in Biol Bull, in 1902, in volume 3, pages 262-288
Published in Biological Bulletin (Woods Hole), in 1902, in volume 3, pages 181-191
Published in Biological Bulletin, in 1902, in volume 3, pages 16-26