Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1874, in volume 26, pages 120-137

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1874, in volume 1873, pages 104-176

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1874, in volume 1873, pages 374-413

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 228-230

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 217

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 74-75

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 161

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 80-81

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 144-146

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 16-17

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 22-23

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 242-260

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 13-15

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 147-152

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 12-13

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 110-115

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 138

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 140-142

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 92-95

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 86-90

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1874, in volume 26, pages 76-77