Youatt, Mr., on the development of the horns in cattle.
Yura-caras, their notions of beauty.
Zebra, rejection of an ass by a female; stripes of the.
Zebus, humps of.
Zigzags, prevalence of, as ornaments.
Zincke, Mr., on European emigration to America.
Zootoca vivipara, sexual difference in the colour of.
Zouteveen, Dr., polydactylism; proportion of sexes at Cape of Good Hope; spiders attracted by music; on sounds produced by fish.
Zygaenidae, coloration of the.