Illænus perovalis.

Ilminster, [560], [669].

Imprints of acalephs or jelly-fish on stone, [772].

----------- feet of bird-like bipeds, [768].

----------- fin-markings, [632].

----------- leaves, [201].

----------- rain-drops on stone, [771].

Incrustation, [38].

Incrusting springs at Matlock, [872].

India, beds of foraminifera in, [362].