...The back fin rises behindthe centre of the back; it is comparatively small, falcate, curvedover the top to a blunt point, and concave behind... 
Robert A. Sterndale 「Natural History of the Mammalia of India and Ceylon」
...maximus, and has a narrowerand less concave inter-orbital space; the nasals are also broaderposteriorly, and less dilated anteriorly, the upper dental linebeing also shorter...
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」
...The head projects in the shape of a cone andthe back is so concave as to give the side view of the chrysalisa very striking appearance...
Clarence M. Weed 「Butterflies Worth Knowing」
...Shell above carinated, fulvous, with two whitish bands; spire short, spotted, the base depressed; the whorls concave with two depressed lines; suture channelled; base granulated, purple...
William Swainson 「Zoological Illustrations, Volume II」
...26); in others the front shin or tibia is formed like a concave shield or shell (fig...
Edward Saunders 「Wild Bees, Wasps and Ants」
...We shall seehereafter that the disk, so large and seemingly solid in theDiscophoræ, thins out in many of the other Jelly-fishes, and becomesexceedingly concave...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...Concavo-convex: hollowed out or concave on one surface,rounded or convex on the other; like a small segment of a hollowsphere...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Cymbiform: boat-shaped: a concave disc with elevatedmargin; navicular...
John. B. Smith 「Explanation of Terms Used in Entomology」
...Fornicate: arched or vaulted: concave within, convexwithout...
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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