...We know that he had a subterranean borerwith which he has penetrated deep into the earth... 
Various 「Astounding Stories, August, 1931」
... To the two friends, these subterranean fortifications bore a certain resemblance to the lower parts of a vessel...
Vicente Blasco Ibanez Charlotte Brewster Jordan 「The Four Horsemen of the Apocalypse」
...It was after daylight that the child discovered a second opening in thewalls of the subterranean chamber, almost opposite that at which thehyenas still stood glaring hungrily at him...
Edgar Rice Burroughs 「Jungle Tales of Tarzan」
... subterranean...
Various 「Mother Earth, Vol. 1 No. 4, June 1906」
...I will now give a few instances of variation in subterranean buds, that is, by suckers, tubers, and bulbs; not that there is any essential difference between buds above and beneath the ground...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...What use are the claws of this tiny flea against rock,sandstone, or hardened clay? The creature must perish if it cannot finda subterranean refuge in good time...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...Sometimes the burrow contains nothing but the well-sinker surprised atits work: sometimes—and not rarely—the hermit will be found embracinga small subterranean fungus, entire or partly consumed...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...The subterranean fungi grow only at certain points, but they are oftenfound in groups...
J. H. Fabre Bernard Miall 「Social Life in the Insect World」
...found in the Cave; with figures of the various species, and an accountof allied forms, comprising notes upon their Structure, Development andHabits; with remarks upon subterranean life in general...
Alpheus Spring Packard 「Our Common Insects」
...In September I see her go down into the soil, which has been loosened by a recent light shower; the movement of the earth turned over keeps me informed of her subterranean progress...
J. Henri Fabre 「More Hunting Wasps」
...There is little evidence of subterranean solution at Chinajá, but northward in central El Petén karsting is common...
William E. Duellman 「Amphibians and Reptiles of the Rainforests of Southern El Peten, Guatemala」
...The family Microhylidaeis a large one, and most of its representatives are specializedfor a subterranean existence and a diet of termites or ants...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...They probably had retired to deep subterranean hibernation sites...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...Becauseof their secretive and subterranean habits most of the frogs aremissed by a collector who searches by turning rocks, or trappingwith pitfalls...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
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