Published in Proc. Acad. Nat. Sci. Philadelphia, in 1883, in volume 35, pages 10-35
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 36
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 43-44
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 44-46
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 52-54
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 55-56
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 69-71
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 72-74
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 96
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 97-107
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 111-112
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 114-115
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 127
Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 134-166
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 204-212
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 214-240
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 248-256
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 260-265
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 281-293
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 312
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 322-323
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 334
Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1883, in volume 35, pages 338