Haeckel synonyms

Thus the affinities of the hydranth are clearly, as Dendy points out, After Haeckel, System der Medusen, by permission of Gustav Fischer.

Haeckel regarded the whole structure as a glandular ectodermal pit formed on the exumbral surface of a medusa-person.

The difference between the theories of Haeckel and Chun is connected with a further divergence in the interpretation of the stem or axis of the cormus.

Haeckel regards it as the equivalent of the manubrium, and as it is implanted on the blind end of the pneumatophore, such a view leads necessarily to the air-sack and gland being a development on the ex-umbral surface of the medusa-person.

If a distal pore or aperture is present, it is excretory in function; suck varieties have been termed " cystons " by Haeckel.