Gill of Echinus, [514], [527]

Gill-cleft, of Echinus, [514];

of Sphaerechinus, [540] f.;

of Strongylocentrotus, [541]

Ginkgo, spermatozoa of, [38]

Glaucoma, [137], [153];

G. scintillans, rate of fission of, [147] f.

Glauconite, [70]

Globiceps, [272]

Globiferae of Centrostephanus longispinosus, [532]