The Collaborative International Dictionary of English v.0.48:

Pulmobranchiata \Pul`mo*bran`chi*a"ta\, n. pl. [NL.],
Pulmobranchiate \Pul`mo*bran"chi*ate\, a. & n.(Zool.)
   Same as Pulmonibranchiata, -ate.
   [1913 Webster]