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