Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 11-19

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 32-37

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 45-88

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 89-160

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 173-197

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 198-205

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 206-210

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 212-213

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 302

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 347-350

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 375

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 413-441

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 442

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 443-451

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 452-462

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 506-515

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 564-565

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 585

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1895, in volume 47, pages 588-589

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1895, in volume 1895, pages 303-340

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1895, in volume 1895, pages 376-407