Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 1-16

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 17-18

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 19-21

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 23-28

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 29-30

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 31-32

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 33-39

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 41-42

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 43-52

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 53-54

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 55

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 57-58

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 59-63

Published in Proc. biol. Soc. Washington, in 1907, in volume 20, pages 65

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 67-69

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 71-74

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 75-79

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 81-84

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 85-86

Published in Proceedings of The Biological Society of Washington, in 1907, in volume 20, pages 87-88

Published in Proc. Biol. Soc. Washington, in 1907, in volume 20, pages 89-119