Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 1-3

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 2

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 7-8

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 9-11

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 11-14

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 65

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1870, in volume 22, pages 74-84

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1870, in volume 22, pages 92-96

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 118-121

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 133

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 150-151

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 152-153

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 154-157

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, pages 162-175

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1870, in volume 22, issue 3, pages 104-107