Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 25-33

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 33-35

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 101-106

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 108-109

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 110-113

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 113-123

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1866, in volume 18, pages 123-132

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 133

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 134-172

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 172-197

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 236-237

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 249

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 279-288

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 289

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 290

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 291-292

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 293-300

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 323-331

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 331-342

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 342-345

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 346-348

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 348-349

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 361-394

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 418-420

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1866, in volume 18, pages 421