LIST OF ILLUSTRA TIONS. 



326. 



370 



33- 



33i- 



332. 

 333- 



334- 

 335- 

 336. 



337- 

 338. 



339- 

 340. 



342. 



343- 

 344- 



345- 

 346. 



PAGE 



Side View of the Brain and 

 Upper Part of the Spinal 

 Marrow 



The Brain as seen when a 

 Vertical Longitudinal Sec- 

 tion has been made through 

 its middle ...... 371 



Enlarged and Diagrammatic 

 View of a Vertical Section 

 carried through the Corpus 

 Callosum and the parts 

 below ........ 371 



Horizontal Section of part of 

 the Brain ...... 373 



Diagram of a Transverse 

 Vertical Section of the 

 Brain, made through the 

 Second, Third, and Fifth 

 Ventricles ...... 374 



Diagram illustrating the pro- 

 gressive Changes that take 

 place during successive 

 stages of the Development 

 of the Brain ..... 376 



Right Side View of Brain of 

 the common Lizard (La- 

 cert a agilis) ..... 379 



Vertical Longitudinal Sec- 

 tions of the Nasal Cavity . 380 



Membrane developed on the 

 Nose of the Bat Mega- 

 derma lyra ..... 380 



Brain of the Perch (Perca 

 Jln-viatilis) seen from above 381 



Vertical Longitudinal, Section 

 of the Brain of the Perch 



381 



Dorsal Aspect of the Brain 

 of a Ray or Skate (Raia 

 batis) . . . 382 



Dorsal Aspect of Brain of a 

 Pigeon (Columba livia) . 383 



Left Side View of Brain of 

 Pigeon 384 



The Spinal Cord .... 385 



Diagram representing the de- 

 velopment of the Eye in 

 successive stages .... 387 



Front View of the Eye, with 

 the Eyelids 388 



Right Side of the Head of 

 one of the Pleuronectidse . 389 



Hammer-headed Shark . . 390 



Diagram illustrating the ar- 

 rangement of the parts of 

 the Brain and the origin of 

 the Nerves 390 



Diagram to illustrate the de- 

 velopment of the Ear in 

 successive stages .... 392 



The Membrane of the Drum 

 of the Ear 395 



FIG, 

 347. 



348. 



349- 



350. 

 351- 

 352. 



353- 

 354- 

 355- 

 356. 



404 



359- 

 360. 



361. 

 362. 

 363- 



364- 



365- 

 366. 



367- 

 368. 



PAGE 



Diagram illustrating the dif- 

 ferent developments in 

 Sauropsidans and Ichthyo- 

 psidans of parts which in 

 Mammah become the Au- 

 ditory Ossicles .... 396 



Head of the common Long- 

 eared Bat (Plecotus auri- 

 tus) ........ 396 



Nervous Supply of the 

 hinder part of the Right 

 Side of the Head of the 

 Shark Hexanchus grisens] 397 

 Infero-lateral View of Head 

 and Aortic Arches of Lepi- 

 dosiren . ..... 398 



General View of the Nervous 

 System, viewed from be- 

 hind ....... 400 



Diagram of the development 

 of the Trunk and its Skele- 

 ton ........ 



Diagram of the further de- 



velopment of the Trunk . 404 

 The Heart, Great Vessels, 



and Lungs : Front View . 407 

 The left Side and the Right 



Side of the Heart dissected 408 

 Heart of Cryptobranchus 



opened on its dorsal aspect 410 

 Arterial System of Man . . 412 

 Diagram representing the 

 Primitive Aortic Arches of 

 Mammals and Sauropsi- 

 dans ........ 415 



The Circulation in a Tad- 



pole in its primitive stage . 417 

 The Circulation in a Tad- 

 pole at a more advanced 

 stage ........ 417 



The Circulation in a young 

 Frog ........ 417 



Main Arterial Vessels of 

 Cryptobranchus . . . .418 



Diagram representing the 

 Vessels and Aortic Arches 

 of a Snake ...... 419 



Diagram representing the 

 Vessels and Aortic Arches 

 of a Lizard ...... 419 



Diagram representing the 



Main Arteries of a Bird 

 Diagram representing the 

 Main Arteries of a Mam- 

 mal ...... 



Diagram representing the 

 early condition of the 

 Circulation in Man . 

 Infero-lateral View of Head 

 and Aortic Arches o f Lepi- 

 dosiren ....... 



420 



420 



424 



