...However at about twelve o'clock the keel of the Bonadventure grated onthe bottom... 
Jules Verne William Henry Giles Kingston 「Abandoned」
...Heem keel dat Spitz, heem t’ink to take dejob...
Jack London 「The Call of the Wild」
... Moreover, here, as in the Shetlands of the early nineteenth century, when the keel touches bottom the seaman loses his rights, and she belongs to the shore...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...As we were going out, and appeared to be clear of the harbour, I heard a grating sound, and felt the vessel’s keel touch the ground...
W. H. G. Kingston 「The African Trader」
...About us beats the sea—the sail-flecked, restless sea, humming its tuneabout our flying keel, unmindful of the voices of men...
W. E. B. Du Bois 「Darkwater」
...The keel is developed in flying mammals (bats)...
Édouard Cuyer 「Artistic Anatomy of Animals」
...The other livingbirds were placed in the sub-class the members of which havea keel on the breast bone for the attachment of the wing-muscles...
John Albert Leach 「An Australian Bird Book」
...There is aventral keel, which may also be visible as animals "sound"(dive)...
Stephen Leatherwood 「Whales, Dolphins, and Porpoises of the Western North Atlantic」
...sonomae, in ridges on either side oftip not enlarged, keel proportionally higher; from E...
John A. White 「The Baculum in the Chipmunks of Western North America」
...dorsalis, in keel lower, angle formed by tip and shaft 130°,usually smaller; from E...
John A. White 「The Baculum in the Chipmunks of Western North America」
...cinereicollis in, keel proportionally higher, shaftshorter, tip proportionally longer, angle formed by tip and shaftsmaller, distal 2/5 of shaft more laterally compressed; from E...
John A. White 「The Baculum in the Chipmunks of Western North America」
...palmeri, in keel higher, angle formed by tip and shaft smaller,distal 2/3 (not 1/2) of shaft markedly laterally compressed, basemarkedly wider; from E...
John A. White 「The Baculum in the Chipmunks of Western North America」
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