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

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 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 53-54

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 85-86

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 57-58

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 1-16

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 33-39

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 87-88

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 19-21

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 59-63

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 55