Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 1-2

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 59-62

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 69

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 79-85

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 86-88

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 88-90

Published in Journal of the Academy of Natural Sciences, Philadelphia, in 1854, in volume 7, pages 106-113

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 141-142

Published in Proc. Acad. Natur. Sci. Philadelphia, in 1854, in volume 7, pages 180-190

Published in Proceedings Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 199-201

Published in Proceedings of the Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 211-216

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 256-264

Published in Proceedings of The Academy of Natural Sciences of Philadelphia, in 1854, in volume 7, pages 415-418

Published in Proc. Acad. Nat. Sci. Philad., in 1854, in volume 1854, pages 98-105

Published in Proc. Acad. Nat. Sci. Philad, in 1854, in volume 1854, pages 192-193

Published in Proc. Acad. Nat. Sci. Philad., in 1854, in volume 1854, pages 193-194