...Upon examination the sphincter muscle whichcloses the anus of the female when stretched willbe found to have a folded appearance... 
Harry M. Lamon 「Ducks and Geese」
...The number of scale rows on the neck, at mid-body, and just anterior to the anus is relatively constant at 27-25-21, respectively; but some individual variation is evident (Table 4)...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...Because females generally are the larger in circumference posteriorly, they could have more scale rows than males just anterior to the anus...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...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」
...From the mouth,nose, and anus bloodstained fluid flows in small quantities...
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」
...Anal orifice: see anus...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Anal tubercles: a pair of prominent, rounded or conicalprocesses, situate one on each side of the anus in certainCoccids...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Juveniles taken in traps were observed to extrude scentglands from the anus when approached...
L. R. Dice 「Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 1920」
...Normally they liejust inside the anus, but on excitement they are everted andthe fold of skin forming the edge of the anus is rolled outwardso that the glands lie outside...
L. R. Dice 「Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 1920」
...They are extremely short-beaked and have apronounced dark stripe, similar to that found on the stripeddolphin, extending from the rostrum to the area of the anus...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...Just below and parallel to this cream-white band is ablack one extending from the area of the eye to the anus...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...The single most distinctive feature of Atlantic white-sideddolphins is an elongated oval zone of white and yellowishwhite along the sides from just below the dorsal fin to the areaabove the anus...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...Taylor (1940a:18) diagnosed this species as having few or no vomerineteeth, no vocal sac, a rather broad and flat head, two large tuberclesbelow the anus, a granular venter, and a green dorsum in life...
William E. Duellman 「The Amphibians and Reptiles of Michoacán, México」
...The tail wasreduced to a mere knob surrounding the anus and dead, exposedbone was visible on most of the dorsal part of the carapace...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
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