Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 122-128
Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1859, in volume 11, pages 196-197
Published in Proc. Acad. Nat. Sci. Philadelphia, in 1859, in volume 11, pages 98-100
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 155-157
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 132-133
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 168-169
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 281-292
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 69-90
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 151-154
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 56-58
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 128-130
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 130-180
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1859, in volume 1859, pages 317-328
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 1
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 90
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 354-355
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 109-110
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 164-165
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 255-256
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 177-186
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 161-164
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 55