Protorosauri, [290];

Dinosauria, [414];

Eusuchia, [440]

Stewart, quoted, on Heloderma, [540] n.

Stinkpot Terrapin, [342]

Suboccipital (first spinal nerve) of Anura, [144]

Subregions, geographical, [74] f.

Surinam Toad, [149], [150]

Syrrhopus, [212]

Systomata, [139]