Part 15

Fœtal: 1st month, that of an avertebrated animal;

Scale: MOLLUSCA (6, 7, 8, 9, 10, 11)

Order: Conchifera, Double-shelled Mollusks

Rocks: 3. Silurian system

Fœtal: 1st month, that of an avertebrated animal;

Scale: ARTICULATA Annelida (12, 13, 14)

Rocks: 3. Silurian system

Fœtal: 1st month, that of an avertebrated animal;

Scale: ARTICULATA Crustacea (15, 16, 17, 18, 19, 20)

Order: Crustacea, Annelida, Crustaceous Fishes

Rocks: 3. Silurian system

Fœtal: 1st month, that of an avertebrated animal;

Scale: ARTICULATA Arachnida & Insecta (21–31)

Order: Crustaceous Fishes

Rocks: 4. Old Red Sandstone

Fœtal: 1st month, that of an avertebrated animal;

Scale: VERTEBRATA Pisces (32, 33, 34, 35, 36)

Order: True Fishes

Rocks: 5. Carboniferous formation

Fœtal: 2nd month, that of a fish;

Scale: VERTEBRATA Reptilia (37, 38, 39, 40)

Order: Piscine Saurians (ichthyosaurus, &c.), Pterodactyles, Crocodiles, Tortoises, Batrachians

Rocks: 6. New Red Sandstone

Fœtal: 3rd month, that of a turtle;

Scale: VERTEBRATA Aves (41, 42, 43, 44, 45, 46)

Order: Birds

Rocks: 6. New Red Sandstone

Fœtal: 4th month, that of a bird;