...The ventral line isthe same for some inches behind the anus... 
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...If the ganderis placed upon his back and pressure appliedaround the anus, the penis will protrude...
Harry M. Lamon 「Ducks and Geese」
...We shall see that before long a true mouth is formed,after which this first aperture takes its place opposite the mouth,retaining only the function of the anus...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
... Four English rabbits, measured from the incisors to the anus, varied between 17 and 17¾ inches in length; whilst two of the Porto Santo rabbits were only 14½ and 15 inches in length...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Occasionally its interior isulcerated, and such is nearly always its condition towards the anus...
Dinks, Mayhew, and Hutchinson 「The Dog」
...The fluid will be returned so fast as it enters, and itmust be allowed to do so, the fingers of one hand being employed againstthe anus to prevent the disordered rectum being ejected with the water...
Dinks, Mayhew, and Hutchinson 「The Dog」
...Young lambs are subject to what is commonly known as “pinning”—that is,their first excrements are so adhesive and tenacious that the orifice ofthe anus is closed, and subsequent evacuations prevented...
Robert Jennings 「Sheep, Swine, and Poultry」
...Sometimes when a sheep scours in warm weather, and clotted dung adheresabout the anus, maggots are generatedunder it, and the sheep perishesmiserably...
Robert Jennings 「Sheep, Swine, and Poultry」
...Rupture intothe rectum will entail a constant escape of feces through the vulva, and, ofcourse, the same condition exists when the anus as well has been torn open...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Similarly the rectum, exposed by reason of the relaxed conditionof the anus, or temporarily in straining to pass the liquid dejection, is of amore or less deep red, and it may be ulcerated...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Alimentary canal: the digestive tract as a whole;begins at the mouth and extends through the body to the anus...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Paranal: at the side of or next to the anus or analstructures...
John. B. Smith 「Explanation of Terms Used in Entomology」
...One band of black begins near the eye and extends down theside of the body to the area of the anus...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...A cream-white band beginning high onthe rostrum extends above and past the eye, continuestowards the tail, and finally dissipates in the body color abovethe anus...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...There is sometimes a brownish bandextending from the dark color of the back in front of the dorsalfin back towards but not reaching the anus...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
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