CONTENTS.
Reading edition
Page
GEOLOGICAL INTRODUCTION 3
TOXODON PLATENSIS, Description of Cranium 16
of Lower Jaw and Teeth 29
MACRAUCHENIA PATACHONICA, Cervical Vertebræ 35
Lumbar Vertebræ 40
Scapula 43
Antibrachium and Fore-foot 44
Femur 48
Tibia, Astragalus, and Metatarsal Bone 50
GLOSSOTHERIUM, Fragment of Cranium 57
MYLODON DARWINII, Lower Jaw and Teeth 63
SCELIDOTHERIUM LEPTOCEPHALUM, Cranium and Teeth 73
Vertebral Column 84
Bones of the Extremities 88
MEGALONYX JEFFERSONII, Lower Jaw 99
MEGATHERIUM CUVIERI, Cranium and Teeth 100
TESSELATED ARMOUR AND BONES, large Edentata 106
MASTODON ANGUSTIDENS, Cuv. (?) 108
EQUUS, Molar Teeth 108
CTENOMYS PRISCUS, and a large Rodent 109
Geological contemporaneity of preceding extinct Mammalia 111