Published in Proc. Acad. Nat. Sci. Philad, in 1878, in volume 1878, pages 21-28

Published in Proc. Acad. nat. Sci. Philad., in 1878, in volume 1878, pages 124-135

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1878, in volume 1878, pages 276-290

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1878, in volume 1878, pages 89-98

Published in Proc. Acad. nat. Sci. Philad, in 1878, in volume 1878, pages 136-147

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 1878, pages 100-101

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 40-41

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 273-275

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 442-443

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 39

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 291

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 270

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 405-406

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 163-164

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 165

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 341

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 347

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 159-162

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 407

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 406-407

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 383-384

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 102-118

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 181-221

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 268-269

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 99

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 38

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 292

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 45-80

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 272

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 86-88

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 293-296

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1878, in volume 30, pages 410-419