Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 3-6

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 7-8

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 9-10

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 11-12

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 13-14

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 15-16

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 17-18

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 19-20

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 29-31

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 33-35

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 37-39

Published in Proceedings of the Biological Society of Washington, in 1939, in volume 52, pages 41-56

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 57-60

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 61-82

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 83-84

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 85-88

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 89-91

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 93-96

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 97-98

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 99

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 101-104

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 105-112

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 121-122

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 123-124

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 125-129

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 131-134

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 135-136

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 137-138

Published in Proceedings of the Biological Society of Washington, in 1939, in volume 52, pages 139-144

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 145-146

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 147-150

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 151-153

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 155-156

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 157-158

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 159-162

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 163-164

Published in Proc. Biol. Soc. Wash, in 1939, in volume 52, pages 165-166

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 167-169

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 171-175

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 177-183

Published in Proceedings of The Biological Society of Washington, in 1939, in volume 52, pages 185-186

Published in Proc. Biol. Soc. Wash, in 1939, in volume 52, pages 187-196