Semionotidae, [497]

Semionotus, [498]

Semiophorus, [677]

Semiplotus, [582]

Semon, [510], [593]

Semper, [625]

Sense-organs, of Ascidians, [53];

of Amphioxus, [128];

of Fishes, [383]

Seriola, [677]