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Mal`a*cos"to*mous (?), a. [Gr. &?; soft
+ &?; mouth.] (Zoöl.) Having soft jaws without
teeth, as certain fishes.

||Mal`a*cos"tra*ca (?), n. pl. [NL.,
from Gr. &?; soft + &?; shell of a testacean.] (Zoöl.)
A subclass of Crustacea, including Arthrostraca and
Thoracostraca, or all those higher than the Entomostraca.

Mal`a*cos"tra*can (?), n.
(Zoöl.) One of the Malacostraca.

Mal`a*cos`tra*col"o*gy (?), n.
[Malacostracan + -logy.] That branch of
zoölogical science which relates to the crustaceans; -- called
also carcinology.

Mal`a*cos"tra*cous (?), a.
(Zoöl.) Belonging to the Malacostraca.

Mal`a*co*toon" (?), n. (Bot.)
See Melocoton.

||Mal`a*co*zo"a (?), n. pl. [NL., fr.
Gr. &?; soft + zo^,on an animal.] (Zoöl.)
An extensive group of Invertebrata, including the Mollusca,
Brachiopoda, and Bryozoa.


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