Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1872, in volume 23, pages 250-294

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 19-21

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 29-30

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 38-41

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 41-42

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 82-96

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 143-154

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 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 218-220

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1872, in volume 24, pages 239-240

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 275-276

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 287-288

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 297-315