Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 308-314

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 328

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 210-211

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 239-244

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 223-230

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 246-247

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 259-262

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 274-276

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 326-328

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 314-315

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1847, in volume 3, pages 233-235