\Ler*n[ae]"a\ (l[~e]r*n[=e]"[.a]), n. [NL., fr. L.
Lernaeus Lern[ae]an, fr. Lerna, Gr. Le`rnh, a forest and
marsh near Argos, the mythological abode of the hydra.]
(Zo["o]l.)
A Linn[ae]an genus of parasitic Entomostraca, -- the same as
the family {Lern[ae]id[ae]}.
Note: The genus is restricted by modern zo["o]logists to a
      limited number of species similar to {Lern[ae]a
      branchialis} found on the gills of the cod.