Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 1-21

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 25-31

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 33-40

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 41-42

Published in Proceedings of the Biological Society of Washington, in 1951, in volume 64, pages 43-46

Published in Proceedings of the Biological Society of Washington, in 1951, in volume 64, pages 47-52

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 59-60

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 63-64

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 65-72

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 73

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 75-80

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 83-87

Published in Proc. Biol. Soc. Washington, in 1951, in volume 64, pages 91-92

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 93-96

Published in Proc. Biol. Soc. Washington, in 1951, in volume 64, pages 97-100

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 101-103

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 105-107

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 109-113

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 117-124

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 125-127

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 129-130

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 131-134

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 135

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 137-140

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 141-143

Published in Proceedings of the Biological Society of Washington, in 1951, in volume 64, pages 145-146

Published in Proceedings of The Biological Society of Washington, in 1951, in volume 64, pages 147-155