| Plate [I.] | Cranium of Toxodon Platensis, nat. size, basal view, with the sixth molar, right side upper jaw, and grinding surface of the seventh molar left side. |
| [II.] | Cranium of Toxodon Platensis, side view. |
| [III.] | Ditto, upper view. |
| [IV.] | Ditto, back view, with two views of the sixth molar, right side, upper jaw. |
| [V.] | Fragment of lower jaw, and teeth of Toxodon Platensis. |
| [VI.] | Cervical vertebræ of the Macrauchenia Patachonica. |
| [VII.] | Ditto, ditto, and of Auchenia Llama. |
| [VIII.] | Lumbar vertebræ of the Macrauchenia Patachonica. |
| a. | Medium convex articular surface joining the body of the sacrum. |
| b. b. | Lateral concavities joining the transverse processes of the sacrum. |
| c. | Ossified ligament of an anchylosed lumbar vertebra. |
| [IX.] | Fig. 1 and 2. Fragments of the Scapula. |
| | Fig. 3. Distal end of the femur of Macrauchenia Patachonica. |
| [X.] | Proximal ends of the anchylosed radius and ulna of Macrauchenia Patachonica. |
| [XI.] | Bones of the right fore-foot, Macrauchenia Patachonica. |
| [XII.] | Femur, Macrauchenia Patachonica. |
| [XIII.] | Anchylosed tibia and fibula, Macrauchenia Patachonica. |
| [XIV.] | Right astragalus, Macrauchenia Patachonica. |
| [XV.] | Fig. 1. External metatarsal bone of the right hind-foot. |
| | Fig. 2. Proximal end of internal metacarpal bone, right fore-foot. |
| | Fig. 3 and 4. Proximal end of middle metacarpal bone. |
| | Fig. 5. Proximal end of external metacarpal bone, right fore-foot, Macrauchenia Patachonica. |
| [XVI.] | Fragment of cranium of the Glossotherium. |
| | Fig. 1. Side view. |
| | Fig. 2. Base view. |
| | Fig. 3. Inside view, all half natural size. |
| | Fig. 4. Os tympanicum, natural size. |
| [XVII.] | Fig. 1. Megalonyx Jeffersonii. |
| | Fig. 2. Megalonyx laqueatus. |
| | Fig. 3 and 4. Mylodon Harlani. |
| | Fig. 5. Mylodon Darwinii. |
| [XVIII.] | Lower jaw of the Mylodon Darwinii. |
| [XIX.] | Fig. 1. Side view of the lower jaw. |
| | Fig. 2 and 3. Last molar tooth. |
| | Fig. 4. Front view of the symphysis of the lower jaw, Mylodon Darwinii. |
| [XX.] | Portion of the skeleton of the Scelidotherium leptocephalum. |
| [XXI.] | Fig. 1. Side view of the cranium. |
| | Fig. 2. Back view of the cranium. |
| | Fig. 3, 4, and 5, anterior molar, upper jaw Scelidotherium. |
| [XXII.] | Upper view of the cranium of the Scelidotherium. |
| [XXIII.] | Fig. 1. Inside view of cranium. |
| | Fig. 2. Articular surface for the lower jaw. |
| | Fig. 3. Section of upper jaw and molar teeth. |
| | Fig. 4. Section of lower jaw and molar teeth, Scelidotherium. |
| [XXIV.] | Cervical and anterior dorsal vertebræ of. |
| | Fig. 1. Scelidotherium. |
| | Fig. 2. Orycteropus. |
| | Fig. 3. Dasypus. |
| | Fig. 4. Myrmecophaga jubata; all one-third nat. size. |
| [XXV.] | Fig. 1 and 2. Humerus, radius and ulna of Scelidotherium. |
| | Fig. 3. Head of humerus. |
| | Fig. 4. Head of radius. |
| | Fig. 5, 6, and 7. Femur of Scelidotherium. |
| [XXVI.] | Fig. 1, 3, and 5. Astragalus of Megatherium. |
| | Fig. 2, 4, and 6. Astragalus of Scelidotherium. |
| [XXVII.] | Fig. 1 and 2. Patella and head of tibia of Scelidotherium. |
| | Fig. 3, 4, and 5. Ungueal phalanx of Scelidotherium. |
| [XXVIII.] | Fig. 1. Astragalus of Megatherium. |
| | Fig. 2. Astragalus of Scelidotherium. |
| | Fig. 3–6. Astragalus of Mylodon or Megalonyx. |
| [XXIX.] | Lower jaw of Megalonyx Jeffersonii. |
| [XXX.] | Fragment of the Cranium of Megatherium Cuvieri. |
| [XXXI.] | Section of the upper jaw and teeth of the Megatherium Cuvieri. |
| [XXXII.] | Fig. 1. Magnified view of structure of molar of Megatherium. |
| | Fig. 2–5. Ungueal phalanx and portions of tesselated armour of Hoplophorus euphractus. |
| | Fig. 6–11. Jaws and teeth of Ctenomys priscus. |
| | Fig. 12. Bones of right hind-foot of a Rodent. |
| | Fig. 13 and 14. Fossil tooth of a Horse. |