C. pinnata, [102], [108]

Cyclospondylic, [198]

Cyclostomata, [421] f., [145] f.;

characters, [146];

external features, [150];

skeleton, [197] f.;

teeth, alimentary canal and digestive glands, [247] f.;

respiratory organs, [279] f.;

vascular system, [315] f.;

blood-glands, [343];