The Collaborative International Dictionary of English v.0.48:

Thecata \The*ca"ta\, n. pl. [NL., from Gr. ? a case.] (Zool.)
   Same as Thecophora.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Thecophora \The*coph"o*ra\, n. pl. [NL., from Gr. ? a case +
   fe`rein to bear.] (Zool.)
   A division of hydroids comprising those which have the
   hydranths in thecae and the gonophores in capsules. The
   campanularians and sertularians are examples. Called also
   Thecata. See Illust. under Hydroidea.
   [1913 Webster]