...” The circle he had drawn embraced a part of the rock smoother than the rest, save that about the centre there were a few rough protuberances or knobs... 
Various 「Stories by English Authors: Africa」
... represents it justafter it has separated from the stem, when it has only two tentacles ateach cluster and simple knobs around the mouth, instead of the complicatedbranching tentacles of the adult...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...These curious knobs, into which the brain does not enter, are separated from each other by a deep medial furrow; and this is perforated by a few minute pores...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Theyconsist of small, shiny, conical knobs, perforated at the top with around hole...
Jean Henri Fabre Alexander Teixeira de Mattos 「The Glow-Worm and Other Beetles」
...In Alaska Murie (1935: 24) “has found old bucks late in April withvelvet knobs well begun...
Francis Harper 「The Barren Ground Caribou of Keewatin」
...(The humpback whale,on the other hand, is distinguished by numerous knobs,some of which are located along the line of the head ridge,with others scattered on the top of the head...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...There was a sort of gasping sigh, and a couple of little puffs like those emitted by a small steam-engine, and the black knobs and the black surface disappeared...
George Manville Fenn 「Off to the Wilds」
...We may conjecture that the cakewith knobs was formerly used for the purpose of determining whoshould be the "Beltane carline" or victim doomed to the flames...
Sir James George Frazer 「Balder The Beautiful, Vol. I.」
...The wings are mere curved appendages, destitute of feathersymbols, but are provided with lateral spurs and have knobs at theirbases...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...The wings are curved projections, without any suggestionof feathers or basal spurs and knobs...
Jesse Walter Fewkes 「Archeological Expedition to Arizona in 1895」
...Wooden knobs painted yellow, used as dance ornaments...
James Stevenson 「Illustrated Catalogue of the Collections Obtained」
...From the bow of the enemy submarine, slanting from another of itspeculiar knobs, a narrow beam of violet light poured, cutting a vividswathe across the teleview...
Various 「Astounding Stories, February, 1931」
...Hehad not seen them for quite a while; it was with difficulty that herecalled which knobs controlled the car's ascent...
Various 「Astounding Stories of Super-Science, November, 1930」
...Behindthe panel was a tall cylinder woundwith shining copper wire, and beside itanother panel, upright, fairly bristlingwith knobs, contact points, potentiometers,rheostats and switches...
Various 「Astounding Stories of Super-Science, March 1930」
...By turningthese two knobs, one of whichgives lateral and the other verticaladjustment, you will manipulate theinstrument until the first telescope ispointing directly toward the President'spillow...
Various 「Astounding Stories of Super-Science April 1930」
...They were speckled black and yellow like toads, and had scales or knobs on their backs like those of crocodiles...
Matthew Flinders 「A Voyage to Terra Australis」
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