Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 1-74

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 75-87

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 89-97

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 99-104

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 105-108

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 109-115

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 117-128

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 129-132

Published in Proceedings of The Biological Society of Washington, in 1894, in volume 9, pages 133-138