...It is built in the shapeof a half orange, of a vast extent, and very lightsome; though itadmits no light but at one window, or, to speak more properly, ata round aperture on the top of the roof... 
Miguel de Cervantes Saavedra 「The History of Don Quixote de la Mancha」
...Aramis’s glance as well as his own plunged at the same moment through the aperture he had made...
Alexandre Dumas, Pere 「Ten Years Later」
...From an aperture near the summit of the lofty escarpment ahairy figure emerged—the head and shoulders first—and fierce eyesscanned the cliff side in every direction...
Edgar Rice Burroughs 「Tarzan the Terrible」
...Instantly Tarzan dove headforemost through the aperture carrying thehangings of antelope hide with him to the floor below...
Edgar Rice Burroughs 「Tarzan the Terrible」
...Hislife, then, depended upon how much of the aperture was submerged...
Edgar Rice Burroughs 「Tarzan the Terrible」
... One after another he pulled out theblocks until he had opened an aperture large enough to admit his body,then he crawled through into a large, low chamber...
Edgar Rice Burroughs 「Tarzan and the Jewels of Opar」
... On hands and knees, he crawled through thesmall aperture...
Edgar Rice Burroughs 「Tarzan and the Jewels of Opar」
...Nostrils basal, covered by a membrane; the aperture linear, oblique, and naked...
William Swainson 「Zoological Illustrations, Volume I」
...Nostrils basal, covered by a membrane, the aperture naked, linear and oblique...
William Swainson 「Zoological Illustrations, Volume I」
...Shell cylindrical, polished, spire conic acuminated, very short; outer lip simple, inner lip thickened, tumid, columella with numerous slender plaits, aperture at the base truncatedly emarginate...
William Swainson 「Zoological Illustrations, Volume I」
...Shell transversely striated; spire moderate, with slender numerous plaits; outer lip dilated, rounded, very thick, and reflected; inner lip thickened above, smooth in the middle; aperture striated...
William Swainson 「Zoological Illustrations, Volume II」
...Shell pale; body whirl angulated; the base flattened, striated and deep violet; aperture broader than long; outer lip deeply emarginate...
William Swainson 「Zoological Illustrations, Volume II」
...Shell subventricose; uniform olive; apex of the spire acute; aperture and spire of equal length; umbilicus closed...
William Swainson 「Zoological Illustrations, Volume II」
...Shell smooth, oval, convex, the margins turned inward; aperture longitudinal, narrow, toothed on both sides, the extremities effuse...
William Swainson 「Zoological Illustrations, Volume II」
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