...They are of flatstones, with cement gutters... 
Richard Harding Davis 「The Congo and Coasts of Africa」
...Bill proportionately narrower than in the River or Bay Ducks; gutters on its sidesless developed; scales on front of tarsus rounded...
Frank M. Chapman 「Color Key to North American Birds」
...Deep gutters behind the stalls, into which one or both hind limbs slipunexpectedly, strain the loins and jar the body and womb most injuriously...
U.S. Department of Agriculture 「Special Report on Diseases of Cattle」
...Theseplains had deep water-worn gutters leading into the valley, so that Iconclude the lateral floods it receives are as copious as those from thehills...
Charles Sturt 「Expedition into Central Australia」
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