...In thickness and appearance at present it more or less resembles a human tongue whose sides might be formed of hexagonal cells, contiguous, and placed back to back... 
Maurice Maeterlinck 「The Life of the Bee」
... The cells are not perfectly hexagonal...
Alpheus Spring Packard 「Our Common Insects」
...It fills the hexagonal chamber with its bulging sides...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...It consists of a single stratum of graceful, hexagonal,regularly-joined cells, full of granules of black colouring matter...
Ernst Haeckel 「The Evolution of Man」
...There was alsoa hexagonal crystal 2...
Various 「The American Journal of Archaeology, 1893-1」
...Perhaps the earliest examples known are the hexagonal pulpit in theBaptistery at Pisa, a similar one in the Cathedral at Siena, and thefountain at Perugia, all by Nicolo Pisano (1206-76)...
Richard Glazier 「A Manual of Historic Ornament」
...The series of small hexagonal shields on the abdomen of thiscurious animal appears to be formed of two series of scalesunited laterally...
Phillip Parker King 「Narrative of a Survey of the Intertropical and Western Coasts of Australia] [Volume 2 of 2]」
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