Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 160-162

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 164-165

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 165

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 176-178

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 185-188

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 205

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 207

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 209-211

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 214

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 218-219

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1842, in volume 1, pages 220-221