Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1887, in volume 3, pages 342-343

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 10

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 11

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 25-27

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 31

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 56

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 60-67

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 154

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 293

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 294

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 309

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 387-388

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 396

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 406-407

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 408-411

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 419-421

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 424-425

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 426-427

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1887, in volume 39, pages 427

Published in Proc. Acad. nat. Sci. Philad., in 1887, in volume 1887, pages 342-343