Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1867, in volume 18, pages 300-314

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1867, in volume 18, pages 317-323

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 1-2

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 2-11

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 15-24

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 34-38

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 38

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 39

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 42-44

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 74

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 81-82

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 93

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 98-99

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 99-100

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 100-124

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 125

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 127-130

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 133-136

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 156-166

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 222-226

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 237

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 243-244

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1867, in volume 19, pages 244-246

Published in Proc. Acad. nat. Sci. Philadelphia, in 1867, in volume 1867, pages 85-86