. The dog in health and in disease : including his origin, history, varieties, breeding, education, and general management in health, and his treatment in disease. Dogs. 128 THE DOG IN HEALTH. complete coitus and nmtually desired, a second is super- fluous ; but of this one can never be sure. The mode of coitus in the dog is characteristic, owing to the pecuhar structure of the penis, the action of the female's vagina, Fio. 8.—Embryo op Dog, Twenty-five Days Old, Opened on Ventral Side. Chest and Ventral Walls have been Removed. a, nose-pits ; 6, eyes ; c, under-jaw (first gill-arch); d,
. The dog in health and in disease : including his origin, history, varieties, breeding, education, and general management in health, and his treatment in disease. Dogs. 128 THE DOG IN HEALTH. complete coitus and nmtually desired, a second is super- fluous ; but of this one can never be sure. The mode of coitus in the dog is characteristic, owing to the pecuhar structure of the penis, the action of the female's vagina, Fio. 8.—Embryo op Dog, Twenty-five Days Old, Opened on Ventral Side. Chest and Ventral Walls have been Removed. a, nose-pits ; 6, eyes ; c, under-jaw (first gill-arch); d, second gill-arch ; e,/,gf, h, heart (e, right, /, left auricle; g, right, h, left ventricle); i, aorta (origin of); fcfc, liver (in the middle between the two lobes is the cut yelk-vein); I, stomach ; m, intestine ; n, yelk-sac ; o, primitive kidneys ; p, allantois ; g, fore-limbs ; h, hind-limbs. The crooked embryo has been stretched straight. (Haeckel, after BischofE.) The penis :erior part ( erectile region is the consists of two erectile portions. In the f the organ there is a bone. The posterior anterior part of the organ there is a bone, rne posterior larger, and during copulation is spas-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Mills, Wesley, 1847-1915. New York : D. Appleton
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectdogs, bookyear1895
