448 



DKUCE. 



INDEX. 



EHRENBERG. 



DEUCE, Mr., inter-breeding, ii. 99 ; value 

 of cross breed of pigs, ii. 100. 



Du Chaillu, fruit-trees in West Africa, 

 i. 327. 



Duchesne, on Fragaria vesca, i. 373, 

 375. 



Dufour, Leon, on Cecidomyia and Miso- 

 campus, i. 5. 



Duck, musk, retention of perching 

 habit bv the, i. 191 ; feral hybrid of, 

 i. 199. 



Duck, penguin, hybrid of, with Egyp- 

 tian goose, ii. 44. 



Duck, wild, difficulty of rearing, ii. 

 219; effects of domestication on, ii. 

 267. 



Ducks, breeds of, i. 290, 291 ; origin of, 

 i. 291 ; history of, ibid. ; wild, easily 

 tamed, i. 292, 293 ; fertility of breeds 

 of, when crossed, i. 294 ; with the 

 plumage of Anas boschas, ibid. ; 

 Malayan penguin, identical in plum- 

 age with English, ibid. ; characters 

 of the breeds of, i. 295-299 ; eggs of, 

 i. 295 ; effects of use and disuse in, 

 i. 299-302, ii. 288; feral, in Nor- 

 folk, i. 199 ; Aylesbury, inheritance 

 of early hatching by, i. 471 ; rever- 

 sion in, produced by crossing, ii. 14 ; 

 wildness of half-bred wild, ii. 19 ; 

 hybrids of, with the musk duck, ii. 

 19, 20; assumption of male plumage 

 by, ii. 26 ; crossing of Labrador and 

 penguin, ii. 75; increased fertility 

 of, by domestication, ii. 90 ; general 

 fertility of, in confinement, ii. 140 ; 

 increase of size of, by care in breed- 

 ing, ii. 183 ; change produced by 

 domestication in, ii. 250. 



DusiERiL, Aug., breeding of Siredon in 

 the branchiferous stage, ii. 379. 



Dun-coloured horses, origin of, i. 61. 



Dueeau DE LA Malle, feral pigs in 

 Louisiana, ii. 7 ; feral fowls in 

 Africa, ibid. ; bud-variation in the 

 pear, i. 401 ; production of mules 

 among the Romans, ii. 88. 



Dusicyon sylvestris. i. 23. 



DOTCH rabbit, i. 111. 



Dutch roller pigeon, i. 158. 



Dutrochet, pelorism in the laburnum, 

 ii. 338. 



Duval, growth of pears in woods in 

 France, ii. 248. 



Duval-Jouve, on Leersia oryzoides, ii. 



69. 

 Duvernot, self-impotence in Lilium 



candidum, ii. 118. 

 Dzierzon, variability in the characters 



and habits of bees, i. 314. 



Earle, Dr., on colour-blindness, ii. 48, 

 322. 



Ears, of fancy rabbits, i. 110; de- 

 ficiency of, in breeds of rabbits, i. 

 112; rudimentary, in Chinese sheep, 

 ii. 306 ; drooping, ii. 291 ; fusion of, 

 ii. 334. 



Eaton, J. M., on fancy pigeons, i. 155, 

 159 ; variability of characters in 

 breeds of pigeons, i. 169; reversion 

 of crossed pigeons to coloration of 

 Columba livia, i. 2C8 ; on pigeon- 

 fancying, i. 216, 225, 226; on 

 tumbler-pigeons, i. 220, ii. 229; 

 carrier-pigeon, i. 219 ; effects of 

 inter-breeding on pigeons, ii. 106; 

 properties of pigeons, ii. 182 ; death 

 of short-faced tumblers in the egg, 

 ii. 211; Archangel-pigeon, ii. 226. 



Echinodermata, metagenesis in, ii.362. 



Ectopistes, specific difference in number 

 of tail-feathers in, i. 167. 



Ectopistes migratorius, sterile hybrids 

 of, with Turtur vulgaris, i. 203. 



Edentata, correlation of dermal system 

 and teeth in the, ii. 321. 



Edgeworth, Mr., use of grass-seeds as 

 food in the Punjab, i. 326. 



Edjionston, Dr., on the stomach in 

 Larus argentatus and the raven, ii. 

 292. 



Edwards and Colin, on English wheat 

 in France, ii. 297. 



Edwards, W. F., absorption of the mi- 

 nority in crossed races, ii. 64. 



Edwards, W. W., occurrence of stripes 

 in a nearly thoroughbred horse, i. 

 60 ; in foals of race-horses, i. 62. 



Eggs, of fowls, characters of, i. 260 ; 

 variations of, in ducks, i. 295; of the 

 s'.k-moth, i. 317. 



Ef- /ft, ancient dogs of, i. 17, 18 ; ancient 

 domestication of the pigeon in, i. 214; 

 absence of the fowl in ancient, i. 258. 



Egyptian goose, hybrids of, with pen- 

 guin duck, i. 296 



Eijrenberg, Prof., multiple origin of 



