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 223-230

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

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 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 308-314

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 326-328

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