Osculum ut phylangium inficit.
"The Anatomy of Melancholy" by Democritus Junior
A=pores; B=subdermal cavity; C=inhalent canal; D=ciliated chamber; E=exhalent canal; F=osculum; G=dermal membrane; H=eggs; J=gemmule.
"Freshwater Sponges, Hydroids & Polyzoa" by Nelson Annandale
The terminal osculum and lateral pores are represented as oval white spaces.
"The Works of Francis Maitland Balfour, Volume 1" by Francis Maitland Balfour