YOLK, variations of, in the eggs of ducks.
YOUATT, Mr., history of the dog. -variations of the pulse in breeds of dogs. -liability to disease in dogs. -inheritance of goitre in dogs. -on the greyhound. -on King Charles' spaniels. -on the setter. -on breeds of horses. -variation in the number of ribs in the horse. -inheritance of diseases in the horse. -introduction of Eastern blood into English horses. -on white Welsh cattle. -improvement of British breeds of cattle. -rudiments of horns in young hornless cattle. -on crossed cattle. -on Bakewell's long-horned cattle. -selection of qualities in cattle. -degeneration of cattle by neglect. -on the skull in hornless cattle. -disease of white parts of cattle. -displacement of long-horned by short-horned cattle. -on Angola sheep. -on the fleece of sheep. -correlation of horns and fleece in sheep. -adaptation of breeds of sheep to climate and pasture. -horns of Wallachian sheep. -exotic sheep in the Zoological Gardens. -occurrence of horns in hornless breeds of sheep. -on the colour of sheep. -on interbreeding sheep. -on Merino rams in Germany. -effect of unconscious selection on sheep. -reversion of Leicester sheep on the Lammermuir Hills. -on many-horned sheep. -reduction of bone in sheep. -persistency of character in breeds of animals in mountainous countries. -on interbreeding. -on the power of selection. -slowness of production of breeds. -passages in the Bible relating to the breeding of animals.
YOUNG, J., on the Belgian rabbit.
YULE, Capt., on a Burmese hairy family.
ZAMBESI, striped young pigs on the.
ZAMBOS, character of the.
ZARCO, J.G., introduction of rabbits into Porto Santo by.
Zea altissima. -mays.
ZEBU. -domestication of the. -fertile crossing of, with European cattle.
ZEBRA, hybrids of, with the ass and mare.
Zephyranthes candida.
Zinnia, cultivation of.
ZOLLINGER on Malayan penguin ducks.
ZOOSPORE, division of, in Algae.
"ZOPF-TAUBE."