Pennsylvania, geology of, 161

Pepperidge tree in Maine, 134.

Perissodactyla, a new type of, 1017.

diplarthra, new genus of, 1018.

Perkins, G. H., on archæology of Vermont, 425.
Permian formation of New Mexico, 1020.

vertebrates, catalogue of, 162.

Phænopepla nitens, 215.

Phalangida, males, producing eggs, 813.
Philabertia cynanchoides, 986.
Phoradendron californicum, 29.
Phyllopod Crustacean, fossil, 496.

Phylloxera, 238, 483, 821, 1011, 1012.

Phytonomus punctatus, 750, 912.
Pieris monuste, 577.

Pinus banksiana, 316.

Pipilo aberti, 221.

fuscus, 212.

Rubber producing tree, 54.

Rusby, H. H., curiosities of tree growth,

Sacrificial stone of Mexico, 752.

Salamander, 727.

Salmon, 177.

land-locked little red, 814.

559.