Source : Webster's Revised Unabridged Dictionary (1913)

Tubularida \Tu"bu*lar`i*da\, n. pl. [NL.] (Zo["o]l.)
   An extensive division of Hydroidea; the tubularians; --
   called also {Athecata}, {Gymnoblastea}, and {Tubulari[ae]}.

Athecata \Ath`e*ca"ta\, n. pl. [NL., fr. Gr. 'a priv. + ? chest,
   box.] (Zo["o]l.)
   A division of Hydroidea in which the zooids are naked, or not
   inclosed in a capsule. See {Tubularian}.