enters into the passage and allows the urine to pass into the vulva, through which it runs out of the body. The clitoris is situated on the upper side of this passage, just inside the lips. It can be seen in the mare when she works the vulva after passing urine. Just below the clitoris are found two or three small glands which secrete the fluid that passes away when the mare is horsing. Mammary Glands, or what is known as the mare’s udder or bag, are two in number, situated between the thighs. In the young mare they are very small, but after the mare is pregnant a few months these glands enlarge, until at foaling time they attain their largest size. They are covered outside by a thin, smooth skin. The substance of them consists of small glands and tubes retain or hold milk until it is drawn away from the bag either by milking or by the young animals sucking. During the time of suckling the young, the glands are largely supplied with blood, from which the milk is secreted. On the under side of each gland is found the teat, or that part taken hold of by the young when sucking. The end of the teat is pierced by several small holes, through which the milk passes. GENITAL ORGANS OF THE BULL. The testicles are ovoid in shape and well developed, its long axis being nearly vertical; the membrane which separate the two testicles is very strong. The spermatic cord and artery are small compared with those of the horse. The penis is long and pointed, and has an S-shaped curve in it just below the pelvic bones; this curve can be felt by feeling just behind the bag. The sheath is long and runs further forward on the belly. It has a tuft of hair on the point of it. During the time the bull is serving the S-shaped part of the penis is straightened out by the action of the protracter muscles, and drawn back into the S-shaped curve by retractor muscles. The urethra is completely enveloped by the fibrous sheath. GENITAL ORGANS OF THE COW. The ovaries of the cow are comparatively smaller than those of the mare, but resemble them in structure. The uterus or womb of the cow somewhat resembles that of the mare, but the inner membrane is different, being covered with sixty or eighty mushroom-like bodies about the size of a pigeon’s egg, more flattened out. These bodies receive the name of cotyledons; to these the placenta or afterbirth is attached--a very important point with which every person interested should be familiar. These may be felt by examining a cow soon after calving. The passage from the womb of the cow is shorter than that of the mare, but is formed on the same principles.