Published in Proc. Biol. Soc. Washington, in 1918, in volume 31, pages 89-92

Published in Proc. Biol. Soc. Wash., in 1918, in volume 31, pages 99

Published in Proc. Biol. Soc. Wash., in 1918, in volume 31, pages 15-20

Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 9-14

Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 85-87

Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 173-180

Published in Proceedings of the Biological Society of Washington, in 1918, in volume 31, pages 41-44

Published in Proc. Biol. Soc. Wash, in 1918, in volume 31, pages 65-68

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 81-82

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 37-38

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 31-32

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 27-29

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 79-80

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 135-136

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 153-154

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 181-187

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 199-201

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 165-170

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 107-108

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 45-46

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 5-8

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 137-138

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 21-25

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 105-106

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 35-36

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 127-129

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 61-63

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 139-151

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 171-172

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 109-123

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 101-103

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 3-4

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 39-40

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 197-198

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 203-204

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 1-2

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 95-96

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 75-77

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 189-196

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 33-34

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 155-159

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 131-134

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 161-163

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 69-74

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 51-57

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 125-126

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 93

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 97

Published in Proceedings of The Biological Society of Washington, in 1918, in volume 31, pages 83-84