xx LIST OF WOODCUTS. 



FIG. PAGE 



152. Diagram of a Horizontal Section through the Right Human Eye. (Seen 



from above.) 183 



153. Eye of a Teleostean 185 



154. Eye of Lacerta muralis, showing the Ring of Bony Sclerotic Plates . . . 187 



155. Eye of an Owl 187 



156. Retina. (After Merkel.) 189 



157. Harderian Gland (H, H 1 } and Lacrymal Gland (Th) of Anguis fragilis . . 193 



158. Diagrammatic Transverse Vertical Section through the Eye of a Mammal . 193 



159. Diagram of the Lacrymal Apparatus of Man 194 



160. Head and Anterior Portion of Body of a Chick, (In part after Molden- 



hauer.) 195 



161. Semidiagrammatic Figure of the Auditory Organ of a Teleostean. (Modi- 



fied from a figure of that of Murcena anguilla by Hasse.) 196 



162. Longitudinal Section of an Ampulla of Gobius. (After Hensen.) . . . 197 



163. Membranous Labyrinth of Lacerta. (From the outer side.) (After C. Hasse.) 200 



164. Membranous Labyrinth of the Crocodile. (From the outer side.) (After 



C. Hasse.) 200 



165. Membranous Labyrinth of the Pigeon. (After C. Hasse.) 201 



166. Membranous Labyrinth of the Ox. (After C. Hasse.) 201 



167. Diagram of the Entire Auditory Organ of Man 203 



168. Bony Cochlea of Man. (After A. Ecker.) 204 



169. Diagrammatic Transverse Section of the Cochlea of a Mammal 204 



170. The Organ of Corti. (After Lavdowsky.) 206 



171. Diagrams of the Oral Cavities of a Fish (A), Amphibian (B), Reptile or 



Bird (C), and Man (D) 210 



172. Diagram of the Entire Alimentary Tract of Man 211 



173. Semidiagrammatic Figure of a Longitudinal Section through a Tooth . . 213 



174. Skull of Batrachoseps attenuatus. (From the ventral side, showing the 



teeth on the parasphenoid. ) 214 



175. A, Diagrams of Transverse Sections through the Jaws of Reptiles, showing 



Pleurodont (a), Acrodont (&), and Thecodont (c) Dentitions. B, a, Lower 



Jaw of Zootoca mvipara b, of Anguis fragilis. (After Leydig.) . . . 215 



176. Figures of the Poison-Fangs of a Viperine Snake 216 



177. Dentition of the Hedgehog (Erinaceus europceus). (The teeth of both 



jaws from the side, and those of the upper jaw from below.) 217 



178. Dentition of the Dog (Canis familiaris) 218 



179. Dentition of the Porcupine (Hystrix hirsutirostris) 218 



180. Dentition of Sheep (Ovis aries) 219 



181. Dentition of a Catarrhine Monkey (Nasalis larvatus) 219 



182. The Poison- Apparatus of the Rattlesnake 221 



183: Head of Spelerpes fusats, with the Tongue extended 223 



184. A, Tongue, Hyoid Apparatus, and Bronchi of a Gecko (Pliyllodadylus 



europceus) ; B, Tongue of Lacerta ; C, of Monitor indicus ; D, of Emys 



europcea 224 



185. Thymus and Thyroid of a Young Stork 227 



186. Intestinal Tract of a Shark . . 229 



