Behavioural Aspects of Emergence in the Hydranth of Campanularia flexuosa (Hincks)

  title={Behavioural Aspects of Emergence in the Hydranth of Campanularia flexuosa (Hincks)},
  author={D. Knight},
THE development of the hydranth of Campanularia flexuosa occurs within a capsule of chitin secreted by the hydranth itself1–4. In order to emerge for the first time the hydranth must in some way dispose of the lid of the capsule. Allman4 states that the lid is pushed off in this species. Kramp5 observed that, though the lid is removed in Campanularia, it is wholly or partly retained as an operculum in the Campanulinidae. Hammett6 assumed that ‘the completely developed hydranth repeatedly… 

Cell migration during growth and morphogenesis in thecate hydroids

The role and mode of cell migration during development of the shoot internode in the colonial hydroid Gonothyraea loveni is studied and the absence of cell proliferation in the hydranths of the thecate hydroid is confirmed.

Regression and replacement of hydranths in thecate hydroids, and the structure of hydrothecae

In 1953 the author described a regression and replacement cycle of hydranths in Laomedea flexuosa and proposed that this is a common feature of thecate hydroids. Here examples are presented of

Oxymetholone treatment for the anemia of bone marrow failure.

Results support the use of oxymetholone in the treatment of patients with moderate degrees of bone marrow failure and symptomatic anemia and the failure of other patients to respond was attributed to complicating factors.