688 



IXDEX. 



zrajEnimM. 



Woolner, Mr., ooservaiioQs on tne 

 ear in man, 15. 



Wormald, Mr., on the coloration of 

 Hypopyra, 315. 



Wounds, healing of, 8. 



Wren, 473; young of the, 481. 



Wright, C. A., on the young of Oro- 

 cetes and Petrooincla, 487. 



— — , Chauncey, great brain-power 

 requisite for language, 48 ; on cor- 

 relative acquisition, 571 ; on the 

 enlargement of the brain in man, 

 610, 



, Mr., on the Scotch deerhound, 



517 ; on sexual preference in dogs, 

 524; on the rejection of a horse 

 by a mare, 525. 



, W. von, on the protective plu- 

 mage of the Ptarmigan, 391. 



Writing, 144. 



Wyman, Prof., on the prolongation of 

 the coccyx in the human embryo, 

 11; on the condition of the great 

 toe in the human embryo, 11 ; on 

 the occurrence of the supra-condy- 

 loid foramen in the humerus of 

 man, 22 ; on variation in the skulls 

 of the natives of the Sandwich 

 Islands, 26 ; on the hatching of the 

 eggs in the mouths and branchial 

 *:avities of maie fishes, 163, 345. 



Xenarchus, ob the Cicadte, 231. 



Xenophon, selection in mankind advo- 

 cated by, 29. 



Xenorhynchus, sexual difference in the 

 colour of the eyes in, 425. 



Xip'iophorus Hellerii^ peculiar anal fin 

 of the male, 337, 338. 



Xylocopa, difference of the sexes in, 

 292. 



Y. 



Varrell, W., on the habits of the 

 Cyprinidae, 250; on Xaia clavatu, 

 331 ; on tiie characters of the male 

 salmon during the breeding season,. 

 332, 342 ; on the characters of the 

 rays, 334 ; on the gemmeous drago- 

 net, 336; on the spawning of the 

 salmon, 344; on the incubation of 

 the Lophobranchii, 346 ; on rivalry 

 in song-birds, 369 ; on the trachea 

 of the swan, 374; on the moulting 

 of the Anatidse, 393 ; on the young 

 of the waders, 486. 



Yellow fever, immunity of negroes 

 and mulattoes from, 193. 



Youatt, Mr., on the development of 

 the horns In cattle, 235. 



Yura-caras, their notions of beauty, 

 580. 



Z. 



Zebra, rejection of an ass by a female, 



540 ; stripes of the, 545 

 Zebus, humps of, 532. 

 Zigzags, prevalence of, as ornaments, 



179. 

 Zinclce, Mr., on European emigration 



to America, 142. 

 Zootoca vivipara, sexual difference in 



the colour of, 357. 

 Zouteveen, Dr., polydactylism, 37 ; 



proportion of sexes at Cape of Good 



Hope, 243 ; spiders attracted by 



music, 273; on sounds produced bj 



fish, 347. 

 Zygsenidi£, colorotion of the, 314 



THE END. 



