Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1858, in volume 9, pages 216-221

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 11

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 12

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 2-4

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 273

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 17-21

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 177-178

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 93-111

Published in Proceedings: Academy of Natural Sciences of Philadelphia, in 1858, in volume 1858, pages 20-29

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1858, in volume 10, pages 180-188