The epithelial layer consists of (1) so-called " indifferent " cells secreting the perisarc or cuticle and modified to form glandular cells in places; for example, the adhesive cells in the foot.
Then come the glandular surface (C), which is formed of smooth polished epidermis with numerous glands that secrete the fluid contents of the pitcher, and finally the detentive surface (D), of which the cells are produced into long and strong bristles which point A FIG.
It may also be glandular in places.
Haeckel regarded the whole structure as a glandular ectodermal pit formed on the exumbral surface of a medusa-person.
A glandular streak extending from the nostril towards the eye is the lachrymal canal.