...—"Ear comparatively small, as broad as long; innermargin very convex forward; outer margin slightly concave beneaththe tip; nose-leaf as in P... 
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
..."
Massive head with large concave frontals, surmounted in G...
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...Nostrils concave, near half the length of the bill, covered by a membrane, opening by a long slit midway between the gape and tip...
William Swainson 「Zoological Illustrations, Volume I」
...nussatella, and two or three others; the spiral volutions are deeply concave, and the tip and base tinged with violet...
William Swainson 「Zoological Illustrations, Volume II」
...Shell nearly cylindrical, carinated, fulvous; spire depressed, concave, spotted, tip acute, the whorls very concave, with numerous subgranulated striæ; base obtuse, striated, with a gibbous belt...
William Swainson 「Zoological Illustrations, Volume II」
...Sulcated: grooved; furrowed with broad, concave,parallel impressed lines...
John. B. Smith 「Explanation of Terms Used in Entomology」
...One side,forming the bottom of the cell, is concave, being beaten down andsmoothed off by the bee...
Alpheus Spring Packard 「Our Common Insects」
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