Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 10

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 80-81

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 81

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 82-83

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 106-112

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 113-120

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 121-124

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 126-128

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 138-139

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 139

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 166-167

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 169

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 170-171

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 172

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 177-178

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 179

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 180

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 254-272

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 273

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 285-291

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 302-328

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 329

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 337-363

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 391-398

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 419-420

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 431-432

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 433-435

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 435-436

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 442-443

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 448-450

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 450-451

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 453-456

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1888, in volume 40, pages 457-460

Published in Proceedings of the Academy ofNatural Sciences of Philadelphia, in 1888, in volume 1887, pages 158-279

Published in Proc. Acad. nat. Sci. Philad., in 1888, in volume 1888, pages 74-79

Published in Proc. Acad. nat. Sci. Philad., in 1888, in volume 1888, pages 193-199