Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 11, pages 195-196
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 11, pages 310-317
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 1-4
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 4-15
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 22-47
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 49-50
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 100-102
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 102-108
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 108-119
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 145-146
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 148-150
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 156-174
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 199-201
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 203-221
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 221-231
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 12, pages 241-266
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 315-321
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 12, pages 328-338
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 12, pages 339-345
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 475-479
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 569-571
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1860, in volume 12, pages 579
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 1859, pages 197-256
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 1859, pages 294-297
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 1859, pages 332-347
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1860, in volume 1860, pages 15-17
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 1860, pages 74-79
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1860, in volume 1860, pages 368-374