Source : Webster's Revised Unabridged Dictionary (1913)

Prosopulmonata \Pros`o*pul`mo*na"ta\, n. pl. [NL., fr. Gr. ?
   forward + L. pulmo a lung.] (Zo["o]l.)
   A division of pulmonate mollusks having the breathing organ
   situated on the neck, as in the common snail.