Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1894, in volume 45, pages 383-385

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 53-59

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 61

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 69-88

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 90-94

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 95

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 110

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 119-129

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 130-149

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 172-180

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 181-183

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 184-190

Published in Proc. Acad, nat. Sci. Phila, in 1894, in volume 46, pages 191-193

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 207

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 213-221

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 222

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 223-224

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 282-288

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 291

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 292-307

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 308-321

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 417-418

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1894, in volume 46, pages 478-479

Published in Proc. Acad. Nat. Sci. Philadelphia, in 1894, in volume 1894, pages 194-206

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1894, in volume 1894, pages 271-281