Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 1-8

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 9-10

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 11-12

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 13-14

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 15-17

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 19-21

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 23-24

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 25-31

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 33-37

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 39-40

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 41-42

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 43-45

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 47-51

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 53-56

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 57-59

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 61-70

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 71-73

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 79-90

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 91-108

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 109-121

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 123-127

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 129-132

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 133-135

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 137-150

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 151-152

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 154-155

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 155-156

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 157-158

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 159-162

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 163-164

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 165

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 166-167

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 167

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 168-169

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 169-170

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 171-182

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 183-184

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 185-186

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 187-193

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 195-198

Published in Proceedings of The Biological Society of Washington, in 1900, in volume 13, pages 199-200