LIST OF ILLUSTKAT1ONS XIX 



FIG. PAGE 



303. Bones of the right wing of a Gannet, Sula alba . . 609 



304. Shoulder-girdle and sternum of a Peacock, Pavo cristatus 610 



305. Dorsal and ventral views of the wing of the Wild-Duck, 



Anas boschas ......... 612 



306. Lateral view of the pelvis and sacrum of a Duck, Anas 



boschas 613 



307. Skeleton of the common fowl, <, Gallus bankiva . . 615 



308. Lateral and dorsal views of the brain of the Pigeon, Columba 



livia 617 



309. Anterior, posterior and dorsal views of the third cervical 



vertebra of an Ostrich, Struthio camelus . . . 618 



310. Diagram of the arterial arches of a Bird .... .620 



311. Diagram of the venous system of a Bird .... 621 



312. The chief viscera of the Pigeon, Columba lima . . . 622 



313. The lungs, kidneys and gonads of the Pigeon, Columba 



livia 626 



314. Section through the skin of a Mammal showing the develop- 



ing hair 637 



315. Ventral view of the cranium of the Dog, Canis familiaris 639 



316. Dorsal view of the cranium of the Dog, Canis familiaris . 640 



317. Dentition of the Dog, Canis familiaris .... 642 



318. Diagrams showing the evolution of the ear-bones in Mam- 



malia . . . . . 644 



319. Dorsal and ventral views of the brain of the Rabbit, Lepus 



cuniculus 646 



320. Diagrammatic transverse section of the bony cochlea and 



its contained sense-organ in a Mammal. . . . 648 



321. Sternum and sternal ribs of the Dog, Canis familiaris . 649 



322. Skeleton of the Rabbit, Lepus cuniculus . . . . 651 



323. Diagrams of arterial arches of Mammals .... 653 



324. Diagram of the venous system of a Mammal . . . 654 



325. The Duckbill, Ornithorhynchus anatinus .... 657 



326. Diagram to show the arrangement of the female genital 



ducts in the Prototheria 657 



327. Ventral view of the shoulder-girdle and sternum of a Duckbill, 



Ornithorhynchus paradoxus ...... 658 



328. Diagram to show the arrangement of the female genital 



ducts of the Metatheria . . 659 



329. The Rock Wallaby, Fetrogale xanthopus, with young in 



the pouch 660 



330. Skull of Lesueur's Kangaroo-rat, Bettongia lesueuri . . 662 



331. The banded Ant-eater, Myrmecobius fasciatus . . . 663 



332. Diagrams to show the arrangement of the female genital 



ducts in the Rabbit and Man as types of Eutheria . 665 



333. Tamandua Ant-eater, Tamandua tetradactyla . . . 666 



