Sentence:  The conchs or <WSD>winkles</WSD>, "Busycon carica" (fig. 204, opp. p. 216) and "B. canaliculata", ... He gave the estimate of one planter who believed that one <WSD>winkle</WSD> was able to destroy a bushel of oysters in a single hour. 
Meaning of the word marked with <WSD> tags:  Any one of various marine spiral gastropods, especially, in the United States, either of two species (noshow=1) and (noshow=1).