REPORT ON THE POLYZOA. 
43 
There is a single, large, oval, interzocecial disc in the wall between the zooecia, where 
they are in apposition. 
3. Kinetoskias, Koren ancl Daniellsen. 
Bugula, sp., Smitt. 
Naresia, "YYyv. Tlioms. 
Character. — Zoarium composed of bifurcating branches radiating from a common 
centre and forming a wide infundibuliform vase. The lower part of the branches united 
by a delicate membrane, and the whole supported on a chitinous cylindrical stem, which 
is rooted by radical Jibrillce. Avicularia marginal, shortly pedunculate. At the bottom 
of each zocecium a special muscle for bending the zocecium forwards. 
In 1867, D. C. Daniellsen 1 described two new forms of Polyzoa found by him in 
Nordland and Finmark, which he proposed to refer to a new genus — Kinetoskias , 
from the circumstance that the branches appeared to have some power of motion 
in curling their extremities outwards. And in the same year, a month or two later, 
Prof. Smitt, 2 apparently unaware that a new name had been proposed, described one of 
the forms noticed by Daniellsen, under the name of Bugula umbella, procured from 
Wijde Bay, Spitzbergen. 
On the 30th January 1873, on the Challenger Expedition, a specimen of large size, 
closely allied to, if not identical with one of those described by Koren and Daniellsen was 
described and figured by Sir C. W. Thomson, 3 under the name of Naresia cyathus. This 
specimen was procured from a depth of 1525 fathoms, in the North Atlantic; and a 
second specimen of the same form but of smaller size was procured on the 2nd March 1876, 
in the South Atlantic, from a depth of 2650 fathoms. Other specimens of a closely allied 
but quite distinct form were obtained on the 10th of September 1875, also in the South 
Atlantic, from a depth of from 32 to 400 fathoms, and again on the 14th December, in lat. 
33° 31' S., and long. 74° 43' W., from a depth of 2160 fathoms. 
The two original forms, first noticed by M. Daniellsen, have been since more fully 
described and figured by himself and M. Koren. 4 
We are thus made acquainted with what appear to be four distinct species of this 
very peculiar type, viz : — 
1. Kinetoskias smittii, Koren and Daniellsen. 
Bugula smittii, Sars. 
1 Forhmdl. Vidensk. Selsk, Christiania, 1867, p. 23. 
8 Kritisk. Forteckn. Skandinav. Hais-Bryozoer, Ofversigt k. Vetenslc.-Akad. Forhandl., 1867, pp. 292-353, pi. xix. 
figs. 28, 31. 
3 Nature, vol. i. p. 387. 
4 Fauna littoralis Norvegise, part iii., 1877, p. 104, pi. iii. figs. 12-14. 
