. Animal Life and the World of Nature; A magazine of Natural History. ales todevelop bosses of bone on the forehead with which no doubt they butted their rivalsor foes. Nature is constantly repeating herself, and she has developed similar excrescences on the skulls offorms of mammalia than thetion. It has been, however,and varied group of hoofeduneven—that so-called horns orthe skull have been developeddefence, and the same end hasdifferent process in the casethickenings of the nasal bonesstiff hairs, and gradually fromhorns of coalesced hair. Bydefined parallelism so charac-—that is to say, b
. Animal Life and the World of Nature; A magazine of Natural History. ales todevelop bosses of bone on the forehead with which no doubt they butted their rivalsor foes. Nature is constantly repeating herself, and she has developed similar excrescences on the skulls offorms of mammalia than thetion. It has been, however,and varied group of hoofeduneven—that so-called horns orthe skull have been developeddefence, and the same end hasdifferent process in the casethickenings of the nasal bonesstiff hairs, and gradually fromhorns of coalesced hair. Bydefined parallelism so charac-—that is to say, bony projec-witli hair or horn—have beenways in the evolution of therefer briefly to the differentas much as they are thethe pecora or horned ruminants,divisible into the followingDeer, (2) the Giraffes, (3) theproper, generally known as thethe deer the horns seem tojaks of the present day) byjection from the frontal bonesfrom which again springs ain all forms of deer but onetimes. This great extensionpedicel is covered continuouslyhair, until such time as its. Photo., W. F. Daiulo, Begents Park. SKULL AND HORNS OF SABLE ANTELOPE. Showing rings on horns. reptiles and in many othercreatures now under considera-chiefly amongst the immenseanimals—five-toed, even andexcrescent growths of bone onfor purposes of offence andbeen attained by a somewhatof the rhinoceros, which onhas developed firstly bumps ofthese hairy bumps imitationthat curious and as yet un-teristic of natures action, hornstions of the skull covereddeveloped in several differentpecorines. It is necessary toforms of these projections, inprincipal means of classifyingThese are in consequencefamilies or groups: (1) theProngbuck, (4) the pecoridsBovklce or ox-like group. Inhave begun (as in the munt-the growth of a bony pro-of the skull (the pedicel),further growth of bone which,or two, branches one or manyof bony growth from thewith blood vessels, skin, andgrowth is complete. Then the blood ceases to circulate,
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