Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1905, in volume 57, pages 455

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1905, in volume 57, pages 400-454

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1905, in volume 57, pages 29-55

Published in Proceedings of the Academy of Natural Sciences, Philadelphia, in 1905, in volume 57, pages 790-843

Published in Proc. Acad. nat. Sci. Philad., in 1905, in volume 57, pages 301-343

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 101-122

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 676-690

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 693-694

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 373-399

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 555-569

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 692-693

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 576

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 162-205

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 210

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 916-918

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 206

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 89-99

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 844

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 294-298

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 694

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 665-675

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 701-704

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 524

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1905, in volume 57, pages 720-752

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1905, in volume 56, issue 3, pages 757-771