...The slightest disturbance caused the ciliarywreaths to be drawn in, and the bodies to be retracted,and descend into their house like a conjuring toy, untilthe appearance first described was reproduced... 
Henry J. Slack 「Marvels of Pond-life」
...Its size increases to such an extent, thatwhen the erection subsides, it cannot be retracted...
Dinks, Mayhew, and Hutchinson 「The Dog」
...In case the end of the bleeding artery has retracted, asharp-pointed hook, called a tenaculum, is used to draw it out far enough totie...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...When satisfied she retracted her trunk,and the bees again closed up the opening with wax...
Francis Huber Anonymous 「New observations on the natural history of bees」
...Autopsy revealed a vestigeof the retracted yolk sac, approximately one millimeter in diameter,on the small intestine...
John M. Legler 「Natural History of the Ornate Box Turtle, Terrapene ornata ornata Agassiz」
...The prepuce is a fold of the internal membrane of the verge of the anus, as in the bird; and the penis, when retracted, is entirely concealed...
David Collins 「An Account of the English Colony in New South Wales, Vol. 2」
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