Sentence:  My hopes wa'n't disappointed. I never saw <WSD>clams</WSD> thicker than they was along them inshore flats. I filled my dreener in no time, and then it come to me that 'twouldn't be a bad idee to get a lot more, take 'em with me to Wellmouth, and peddle 'em out. <WSD>Clams</WSD> was fairly scarce over that side of the bay and ought to fetch a fair price. 
Meaning of the word marked with <WSD> tags:  A bivalve mollusk of many kinds, especially those that are edible; for example the (soft-shell clam) ("Mya arenaria"), the hard clam ("Mercenaria mercenaria"), the sea clam or (hen clam) ((ver=161126)), and other species. The name is said to have been given originally to the "Tridacna gigas", a huge East Indian bivalve.