Porcupine, fossil, [803].

Porifera, [219].

Portishead, [864].

Portland. See [Isle of Portland].

-------- oolite, [27].

Post-pliocene deposits, [23].

Potamides, [425].

Potamogeton, fossil, [106], [201].

Poteriocrinus, [287].

Potsville, U.S., [645].