of Enteropneusta, [11], [12], [20], [30];

of Pterobranchia, [25], [27];

of Tunicata, [47], [67], [105];

of Amphioxus, [120];

of Fishes, [155], [277] f.

Gillaroo Trout, [260]

Gills—see Respiratory organs

Ginglymostoma, [447]

Girardinus, [616];

sexual congress, [414]