CONTENTS ix 



PA GK 



MUSCLES OF THE APPENDAGES 185 



EYE-MUSCLES 186 



VISt'EKAL .MUSCLES 187 



of Fishes 187 



of Amphibians 188 



of Amniota 189 



D. ELECTRIC ORGANS 190 



E. NERVOUS SYSTEM AND SENSORY ORGANS 193 



I. CENTRAL NERVOUS SYSTEM 195 



Membranes of the brain and spinal cord 195 



1. SPINAL CORD 198 



2. BRAIN (general description and development) 199 



of Cyclostomes 204 



of Elasmobranchs . . 208 



of Ganoids 211 



of Teleosts 211 



of Dipnoans 214 



of Amphibians . 215 



of Reptiles 220 



of Birds 221 



of Mammals 225 



II. PERIPHERAL NERVOUS SYSTEM . . . . . .230 



1. SPINAL NERVES .... 233 



2. CEREBRAL NERVES 234 



Sympathetic 247 



III. SENSORY ORGANS (general description and development) . 249 



SENSE-ORGANS OF THE INTEGUMENT 250 



'(. Xerve-Eminences 250 



b. End-buds and gustatory organs 254 



c. Tactile Cells and Corpuscles 255 



(L Club-shaped or lamellar Corpuscles 257 



OLFACTORY ORGAN (general description and development) . . 258 



of Cyclostomes 259 



of Fishes 261 



of Amphibians 263 



of Reptiles .265 



of Birds 266 



of Mammals 267 



Vomero-nasal (Jacobson's) Organ 271 



EYE (general description and development) 273 



of Amphioxus 277 



of Cyclostomes 278 



of Fishes . . 279 



