Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 1-64

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 65-80

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 81-104

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 105-132

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 133-150

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 151-152

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 153-154

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 157-158

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 159-163

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 164-174

Published in Proceedings of The Biological Society of Washington, in 1892, in volume 7, pages 175-177