Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 9-11
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 12
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 13-18
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 36
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 39-56
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 280-281
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 296-297
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 300
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 301
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 319-321
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 322-341
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 342-343
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 344-345
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 349-350
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 350-351
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 352-354
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 366-368
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 373-376
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 384
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1886, in volume 38, pages 390