Note TN1 — Chapter XII
Reading edition
Transcriber’s Note. The following are included in the illustration: Mammalia, Sauropsida, PROTO-AMNIOTA, Amphibia, Teleostei, PROTO-PENTADACTYLOIDE, Ganoidei, Dipnoi, PROTO-GANOIDEI, Holocephali, Elasmobranchii, PROTO-GNATHOSTOMATA, Cyclostomata, PROTO-VERTEBRATA, Cephalochorda, PROTOCHORDATA, Urochorda.