Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1872, in volume 23, pages 250-294
Published in Proc. Acad. Nat. Sci. Philadelphia (ser. 3), in 1872, in volume 24, pages 22-29
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 50-55
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 167
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 297-315
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 97-107
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 142
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 82-96
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 281-282
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 38-41
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 31
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 19-21
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 288-290
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 275-276
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 258
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 270-274
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 9-10
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 29-30
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 218-220
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 143-154
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 213-214
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 216-217
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 287-288