Rhynchonella plicatilis, [388], [391].

------------ subplicata, [388], [391].

Rhynchosaurus articeps, [712].

-------------, foot-prints of, [753].

Richardson, Mr. W., researches of, [791], [843].

Richmond, Virginia, [97].

------------------, diatomaceous earth at, [97].

Ridgway Hill, Dorset, [522], [557].

Riley, Dr., researches of, [713].

Ringinella, [426].