Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1879, in volume 30, pages 348-381

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 16

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 31

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 133-136

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 140-143

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 146-147

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 150-152

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 152-154

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 154-156

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 163-164

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 164-165

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 195-196

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 197-198

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 205-207

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 207-208

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 209-210

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 379-380

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 381-382

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 432-438

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 439

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 448-450

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1879, in volume 31, pages 450-454

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1879, in volume 1879, pages 14-15

Published in Proceedings of The Academy Philadelphia, in 1879, in volume 1879, pages 17-30