XxX LIST OF ILLUSTRATIONS. 
FIG. PAGE 
140. Blood-corpuscles of Man [9]............eceeeee eee ee eeeee 184 
T4ts. ViscerarOf Proge sissies vere ae saa oeieldomsiaparemghe tphce a Roe wA ve 185 
142, Digestive Organs of Man [9].......... 0. cece eee eee e eee 186 
143. Growth of Frog’s Lung from Primitive Fuod-tube........... 187 
144. Growth of Frog’s Egg [2] ......... 02 ccc e cece ce eee teens 188 
145. Very Young Tadpoles [2].................5 Retad (bea eas 
146. Various Stages of Tadpole [2]....... 0... 2... ce ee cee eee eee 
147. Young Frogs [2]......----eeeeeeeeee 
148. The Use of a Muscle................. 
149. Striped Muscle-fibres [g].......-. 20 ccc c eee ce ee eee serene 
150. Unstriped Muscle fibres [9].........-.eee cee eee eee cence 
151. A Frog’s Skeleton ......0 gece cccccccvccvececcccssonesens 
152. A-Man's: Skeletonts.0:< sisc-aie dudes sods eerste ees: gerd 
T53.: BrainOf Progi 4. ocisis cen Schl esddacaees Swen ersae MRE EAM Ase 
154. Brain and Spinal Cord of Man............seeeeer ee eeeeees 
155. Beaks of Various Birds...........2ce eee ee cee eee e eee eens 
156. The Digestive Organs of a Bird... ....... 00sec cence eee 
157. Diagram of the Heart of a Bird [3] 
158. The Skeleton of a Bird... 1... ... ec cece cece cece eee e ees 
159. A Swallow Feeding Her Young.............0eceeee ee eeeee i 
160. Arm of Man, Fore Leg of Dog, Wing of Bird............... 204 
TOD AL Birds, Wang ieee actie'0 6 och svnie sr ciotein wie. aca 8764 ace pete: Aneneseieia Wee ed 204 
162. The Sternum of a Shrike 2.0.0... 0... cece cee eee ee eee 205 
TO3 0 THeath ers ssc ite teccs Hate ata He Sansa GS Seine ds aRanele ete es 206 
164s, A. Birds Le gd: rissid a 'a's ¥en g <igierstensapeig WA: CGO ans Seer os 207 
1605. Feéctiof Birds.ninccecesaiaegeeteeaieds: Ss vans nsw d § 208 
166.. "The Archaeopteryx. isc 552065 enevaceae oes eeg es ned eden vs 209 
167: ‘Teethiof Man: [g}vasss¢ 22422 nensecaters cas et see eeweGe ses 212 
HOS: "Teethiob Dog x /oats. caine 28 Sea ais aarti peisiastea oot ale i Rvayensanns Aue 212 
169. Teeth of a Sheep [3] ....-- see ee cece eect cece ec ee ee enees 213 
DOs TESthsOb are sivcovtyesa:anaye. tian e1a.b, a eieeasove twos ashe da asegio wale waters 213 
171. Skull of Cow Showing Teeth........... 0. cc cece eee e eee eee 214 
172. ThectHuman By saicwnadiaa diesels setae da thea tnceae OMe 214 
173. Skeletons of Man and Horse [10].......-....00eeeeeeeeeee 215 
174. Bones of Leg and Arm of Man [11] .......-.... eee seeeeee 216 
175. Vertebral Column of Man [11]............ cece eee eee eee 216 
176. Human Skull [11] .cscweniie ceed deeds wenemeee ene es ccamnaes 217 
177. First and Second Vertebrae of Man [9].............eeeee00s 219 
178. Skeleton of Gorilla, wsisss crave ay  o05 40 4 sievceaieue ae aareie sreiare 220 
179. Diagram Showing Circulation of Blood in Man [r1]......... 221 
180. Skeleton of Bat Showing Wings...............0cceseccueee 222 
181. Arm and Hand of Man [11] ........... 0... ccc eae ee ee eee 223 
182. Skeleton of Chimpanzee Showing Hand..................., 223 
183. Fore Foot of Mole...... 0.0... 0. cece cece ec eee e ee eneeeneey 224 
184. FOE: FOOtrof Cats ic sc seis sinveiessiasie.t 08 eye wis ecier Vg dnek eae baie c-, 224 
185; Fore Heet OF COW si. ans dvewcuduen eth ae aietaghs acces SeN ea 225 
186.. Fore Feét:0f Horses o.cien i sees denies eo side sige lier vay cus 225 
187, Foot of Hlephanti icc wsccccaciax ohoades seeieeem siete... 225 
E88. Feet of Beare 3sic:s aise apanesinscetads 865% 4 aa Aa Oates Sx oes 225 
189. Sole of Foot of Man, of Dog, and of Horse [z0]............. 226 
Igo. Finger of Man and of Horse [10]............ 0. .e eee eee ae 227 
