...Instantly Tarzan dove headforemost through the aperture carrying thehangings of antelope hide with him to the floor below... 
Edgar Rice Burroughs 「Tarzan the Terrible」
...The tracker followed cautiously in time to see the rays of theflickering light dimly visible from an aperture in the floor beforehim...
Edgar Rice Burroughs 「Tarzan the Terrible」
...The mouth is very retractile, and the aperture isshaped as in ordinary leeches...
J. Emerson Tennent 「Sketches of the Natural History of Ceylon」
...suillus, but the nostrilsare differently shaped; each nostril forms a distinct tube directedsublaterally with a circular aperture marked by a very small notchon the outer and upper margin (Dobson)...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...In the latter there is a considerable bulging belowthe aperture of the ear called the bulla tympani, or bulb of thedrum...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...Nostrils broad, basal, nearly naked, the aperture much nearer the tip than the gape of the bill...
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 with elevated, longitudinal, obtuse, entire ribs, the interstices smooth, the base granulated; spire lengthened; pillar four-plaited; aperture short...
William Swainson 「Zoological Illustrations, Volume I」
...Shell coniform, broad; aperture effuse, tumid callosity on the inner lip large, and spreading over the spire...
William Swainson 「Zoological Illustrations, Volume I」
...Shell univalve, turbinated, inversely conic, convolute; aperture longitudinal, narrow, not toothed; base effuse; spire very short...
William Swainson 「Zoological Illustrations, Volume I」
...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 globose, very smooth, olive; spire depressed; margin of the aperture thick, fulvous, grooved; umbilicus small, contracted, placed near the base; operculum shelly...
William Swainson 「Zoological Illustrations, Volume II」
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