3840_Chapter 20: Arthropoda- Crustacea

(37:46)

3840_Chapter 24: Fishes

(37:48)

Brachiopoda

(5:5)

Crustaceans

(6:44)

3840_Chapter 19: Arthropoda- trilobites, chelicerates and myriapods

(1:6:39)

20

(2:33)