...If the ganderis placed upon his back and pressure appliedaround the anus, the penis will protrude... 
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)」
... 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.」
...Length of Body from Incisors to Anus...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...In perfect health the anus should be small, firm, close, and entirelyretracted; especially should it be cleanly...
Dinks, Mayhew, and Hutchinson 「The Dog」
...Tumors of a solid nature also form about the anus, and are likewiseconsequent upon neglected piles...
Dinks, Mayhew, and Hutchinson 「The Dog」
...The anus alsoprotrudes, and the orifice is thickened; while, possibly, a markedtendency to piles may at the same time be displayed...
Dinks, Mayhew, and Hutchinson 「The Dog」
...The irritantproducts of the intestinal fermentations may, however, irritate and excoriatethe skin around the anus, which becomes red, raw, and broken out in sores forsome distance...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Anal organs: Collembola; the two modified hairs arisingfrom a tubercle ventro-cephalad of the anus and usually curvingcaudo-dorsad...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Rectum: a chamber, variable in size and form, justwithin the anus, in which the excretions are formed or molded forexpulsion from the body:= cloaca...
John. B. Smith 「Explanation of Terms Used in Entomology」
...These glands arethree in number, one on each side of the anus and one beneath...
L. R. Dice 「Notes on the Mammals of Gogebic and Ontonagon Counties, Michigan, 1920」
...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」
...Heavily infested adults, observed in early July, were literally coveredwith chiggers; red larvae outlined nearly all the scutes of theshell, the anus, the mouth, and the eyes...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
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spleens Woodbridge sooty
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