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Any one of numerous species of aquatic beetles belonging to Dytiscus and allied genera of the family Dytiscidæ, and to various genera of the family Hydrophilidæ. These beetles swim with great agility, the fringed hind legs acting together like oars.

Any aquatic bird; a water fowl.

Any one of numerous species of large, rapacious, aquatic, hemipterous insects belonging to Belostoma, Benacus, Zaitha, and other genera of the family Belostomatidæ. Their hind legs are long and fringed, and act like oars. Some of these insects are of great size, being among the largest existing Hemiptera. Many of them…

A large West African chevrotain (Hyæmoschus aquaticus). It has a larger body and shorter legs than the other allied species. Called also water deerlet.

An aquatic kind of buttercup (Ranunculus aquatilis), used as food for cattle in parts of England. Great water crowfoot, an American water plant (Ranunculus multifidus), having deep yellow flowers.

Any one of numerous species of small aquatic Entomostraca belonging to the genera Cyclops, Daphnia, etc; -- so called because they swim with sudden leaps, or starts.

A small American hare or rabbit (Lepus aquaticus) found on or near the southern coasts of the United States; -- called also water rabbit, and swamp hare.

Either of several tropical aquatic plants of the genus Eichhornia, related to the pickerel weed.

Any aquatic lizard of the genus Varanus, as the monitor of the Nile. See Monitor, n., 3.

Any plant of the genus Myriophyllum, aquatic herbs with whorled leaves, the submersed ones pinnately parted into capillary divisions.

A kind of mint (Mentha aquatica) growing in wet places, and sometimes having a perfume resembling bergamot.

Any of numerous species of aquatic mites belonging to Hydrachna and allied genera of the family Hydrachnidæ, usually having the legs fringed and adapted for swimming. They are often red or red and black in color, and while young are parasites of fresh-water insects and mussels. Called also water tick, and water spider.…

t long. Called also two-banded monitor, and kabaragoya. The name is also applied to other aquatic monitors.

Any one of numerous species of aquatic salamanders; a triton.

orial birds of the genus Cinclus (or Hydrobates), especially the European water ousel (C. aquaticus), and the American water ousel (C. Mexicanus). These birds live about the water, and are in the habit of walking on the bottom of streams beneath the water in search of food.

Any plant of the aquatic umbelliferous genus Sium, poisonous herbs with pinnate or dissected leaves and small white flowers.

A plant that grows in water; an aquatic plant.

of numerous species of rails of the genus Rallus, as the common European species (Rallus aquaticus). See Illust. of Rail.

An aquatic American plant (Brasenia peltata) having floating oval leaves, and the covered with a clear jelly.

Any aquatic pulmonate gastropod belonging to Planorbis, Limnæa, and allied genera; a pond snail.