Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 221-238

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 298

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 238-253

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1856, in volume 8, pages 95-96

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1856, in volume 8, pages 153-156

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1856, in volume 8, issue 4, pages 146-153

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 130-131

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1856, in volume 8, pages 106-108

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 19-25

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 92-95

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 215

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 162-163

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 105-108

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 144

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 260-261

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1856, in volume 8, pages 161