XX 
LIST OF ILLUSTRATIONS . 
FIG. 
140. Blood-corpuscles of Man [9].. 
141. Viscera of Frog. 
142. Digestive Organs of Man [9]. 
143. Growth of Frog’s Lung from Primitive Food-tube. . 
144. Growth of Frog’s Egg [2]. 
145. Very Young Tadpoles [2]. 
146. Various Stages of Tadpole [2]. 
147. Young Frogs [2]. 
148. The Use of a Muscle. 
149. Striped Muscle-fibres [9]. 
150. Unstriped Muscle fibres [9]. 
151. A Frog’s Skeleton. 
152. A Man’s Skeleton. 
153. Brain of Frog. 
154. Brain and Spinal Cord of Man. 
155. Beaks of Various Birds. 
156. The Digestive Organs of a Bird. 
157. Diagram of the Heart of a Bird [3]. 
158. The Skeleton of a Bird. 
159. A Swallow Feeding Her Young. 
160. Arm of Man, Fore Leg of Dog, Wing of Bird. 
161. A Bird’s Wing. 
162. The Sternum of a Shrike..*. 
163. Feathers. 
164. A Bird’s Leg. 
165. Feet of Birds. 
166. The Archaeopteryx. 
167. Teeth of Man [g]. 
168. Teeth of Dog. 
169. Teeth of a Sheep [3]. 
170. Teeth of Hare. 
171. Skull of Cow Showing Teeth. 
172. The Human Eye. 
173. Skeletons of Man and Horse [10]. 
174. Bones of Leg and Arm of Man [11]. 
175. Vertebral Column of Man [11]. 
176. Human Skull [11]. 
177. First and Second Vertebrae of Man [9]. 
178. Skeleton of Gorilla. 
179. Diagram Showing Circulation of Blood in Man [n] 
180. Skeleton of Bat Showing Wings. 
181. Arm and Hand of Man [11]. 
182. Skeleton of Chimpanzee Showing Hand. 
183. Fore Foot of Mole. 
184. Fore Foot of Cat. 
185. Fore Feet of Cow. 
186. Fore Feet of Horse. 
187. Foot of Elephant. 
188. Feet of Bear. 
189. Sole of Foot of Man, of Dog, and of Horse [10].. . . 
190. Finger of Man and of Horse [10]. 
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