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Updated: June 26, 2025
We have plenty of cases of rudimentary organs in our domestic productions, as the stump of a tail in tailless breeds, the vestige of an ear in earless breeds, the reappearance of minute dangling horns in hornless breeds of cattle, more especially, according to Youatt, in young animals, and the state of the whole flower in the cauliflower. We often see rudiments of various parts in monsters.
The female retains her horns from the time when they are fully developed, namely, in September, throughout the winter until April or May, when she brings forth her young. Mr. Crotch made particular enquiries for me in Norway, and it appears that the females at this season conceal themselves for about a fortnight in order to bring forth their young, and then reappear, generally hornless.
Porters even in Petersburg try to avoid the eyes of visitors, and in Moscow much more so; no one answered Bersenyev's call; only an inquisitive tailor, in his shirt sleeves, with a skein of grey thread on his shoulder, thrust out from a high casement window a dirty, dull, unshorn face, with a blackened eye; and a black and hornless goat, clambering up on to a dung heap, turned round, bleated plaintively, and went on chewing the cud faster than before.
Her manger was full of fresh-cut grass; and half-buried in this grass, at one end of the manger, with her back against the wall, sat Annie, holding one of the ears of the hornless Brownie with one hand and stroking the creature's nose with the other.
He was the product of a freak of heredity. In the fat-soiled valley-lands, some fifteen miles back of Ringwaak Hill, the farmers had a heavy, long-wooled, hornless strain of sheep, mainly of the Leicester breed, which had been crossed, years back, by an imported Scotch ram of one of the horned, courageous, upland, black-faced varieties.
In such cases as the one-eared rabbits, the two-legged pigs, the three-legged dogs, the one-horned stags, hornless bulls, earless rabbits, lop-eared rabbits, tailless dogs, &c., if the father or the mother or the embryo had suffered from some accident or disease which might plausibly have been assigned as the cause of the original malformation, these transmitted defects would readily be cited as instances of the inheritance of an accidentally-produced modification.
Thus camels, guanacoes, chevrotains, and musk-deer, are hornless, and they have efficient canines; these teeth being "always of smaller size in the females than in the males." The Camelidae have, in addition to their true canines, a pair of canine-shaped incisors in their upper jaws.
We may suppose that the factor for horns had disappeared entirely from the hornless sheep by a mutation, but in the horned breed another mutation had been a weakening of the influence of the sexual hormones on the development of the character, which, as in all such cases, is really inherited in both sexes.
But with domesticated sheep the presence or absence of horns is not a firmly fixed character; for a certain proportion of the merino ewes bear small horns, and some of the rams are hornless; and in most breeds hornless ewes are occasionally produced. Dr. 'Uber die knochernen Schadelhocker der Vogel, in the 'Niederland. Archiv fur Zoologie, B.i.
Unfortunately, it is not possible to distinguish the sexes except upon close examination, for both are hornless, and as a result the natives sometimes kill females which they would prefer to leave unmolested. The musk deer use their tusks for fighting and also to dig up the food upon which they live. I frequently found new pine cones which they had torn apart to get at the soft centers.
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