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 55

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 69-90

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 91-92

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 109-110

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 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 11, pages 132-133

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1859, in volume 11, pages 150

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 155-157

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 164-165

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 177-186

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1859, in volume 11, pages 196-197

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 281-292

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 1859, pages 317-328