Published in Biol Bull, in 1921, in volume 40, pages 32-72

Published in Biol Bull, in 1921, in volume 40, pages 73-104

Published in Biol Bull, in 1921, in volume 40, pages 259-269

Published in Biol Bull, in 1921, in volume 40, pages 325-348

Published in Biol Bull, in 1921, in volume 40, pages 349-368

Published in Biol Bull, in 1921, in volume 41, pages 78-97

Published in Biol Bull, in 1921, in volume 41, pages 144-152

Published in Biol Bull, in 1921, in volume 41, pages 188-202

Published in Biol Bull, in 1921, in volume 41, pages 203-220

Published in Biol Bull, in 1921, in volume 41, pages 221-240

Published in Biol Bull, in 1921, in volume 41, pages 241-247

Published in Biol Bull, in 1921, in volume 41, pages 288-300

Published in Biol. Bull., in 1921, in volume 41, pages 301-305

Published in Biol Bull, in 1921, in volume 41, pages 307-317