Biol. Bull. Sign up for etocs!
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Biol Bull 54: 524-528. (June 1928)
© 1928 Marine Biological Laboratory
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by KEPNER, WM. A.
Right arrow Articles by MILLER, L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by KEPNER, WM. A.
Right arrow Articles by MILLER, L.

A NEW HISTOLOGICAL REGION IN HYDRA OLIGACTIS PALLAS

WM. A. KEPNER 1 and LULU MILLER 1

1 UNIVERSITY OF VIRGINIA

We have observed that the basal disc's ectoderm in hydra not only secretes adhesive material, with which the polyp fixes itself to some submerged surface, but that it also under certain conditions elaborates a gas. This gas is caught within the mucus-like secretion of the basal disc and retained therein. The bubble, thus retained, increases in size until the hydra is lifted to the surface by it. At the surface of the water the retaining vesicle of mucus breaks and spreads as a circular raft from which the hydra hangs beneath the water's surface.

The ectoderm of the basal disc is thus seen to have a double function. Associated with this region of the ectoderm of hydra there has been found a pecular region of endoderm. The endoderm of this region is characterized by its component cells having the appearance of the epithelio-muscular cells of the oral two thirds of the body as over against the highly vacuolated epitheliomuscular cells of the aboral third of the body.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1928 by the Marine Biological Laboratory.