RIVER n.
mollusk of the genus Ancylus, having a limpet-shaped shell. -- River pirate (Zoöl.), the pike. -- River snail (Zoöl.), any species of fresh-water gastropods of Paludina, Melontho, and allied genera. See Pond snail, under Pond. -- River tortoise (Zoöl.), any one of numerous fresh-water tortoises inhabiting rivers, es…
RUSH n.
. -- Rush grass, any grass of the genus Vilfa, grasses with wiry stems and one-flowered spikelets. -- Rush toad (Zoöl.), the natterjack. -- Scouring rush (Bot.) Same as Dutch rush, under Dutch. -- Spike rush, any rushlike plant of the genus Eleocharis, in which the flowers grow in dense spikes. -- Sweet rush, a sw…