Full resolution (JPEG) - On this page / på denna sida - Sidor ...
<< prev. page << föreg. sida << >> nästa sida >> next page >>
Below is the raw OCR text
from the above scanned image.
Do you see an error? Proofread the page now!
Här nedan syns maskintolkade texten från faksimilbilden ovan.
Ser du något fel? Korrekturläs sidan nu!
This page has never been proofread. / Denna sida har aldrig korrekturlästs.
length, either straight or a little curved at one point. The
diameter of these minute spicules is comparatively great.
Colour. Grey-white, when preserved in spirit.
Habitat. East-coast of Greenland, Lat. 65°40, Long. 35° 32’ W.,
depth 25—40 fathoms (578 S.).
Genus Leucandra H.
Leucandra cylindrica n. sp.
Plate 22, lig. 14—22, Plate 26, fig. 3.
This species is represented in the collection of arctic
sponges in the Zoological State Museum at Stockholm only
by solitary forms from Pitlekai. There is much
resem-blance between our specimens of the above-mentioned species
and HgeckeTs description of Leucandra ananas Mont. (H.).*}
The spicules of L. cylindrica agree with those of L. ananast
the quadriradiate of the inner surface excepted. In L.
cylindrica these spicules have a much larger apical ray than in
L. ananas. And, besides that, our new species has a kind of
minute acerate spicules, inflated near one point and slightly
spined along the same point, which spicules are not to
be-found in L. emanas.
The sponge forms a cylindrical arcuated or straight tube,
attached to branches of sea-weed. The base is round and
usually bent round the branche. Most specimens are furnislied
with a short ciliary tube of long, slender, acerate spicules. The
outer surface is slightly roughned in examples from stat. 1015,.
smooth in the rest. The central cylindrical cloaca is nearly
as long as the sponge and armed with the apical ray of the
quadriradiate spicules. The length of the greatest specimen
is 40 mm.
Skeleton. The skeleton consists of gastric
quadriradiate spicules with long apical ray, of parenehymal
quadriradiate spicules with shorter apical ray, of large dermal
acerate, of very slender acerate spicules from the peristome,
of very minute acerate spicules from the gastric layer, and
of triradiate spicules.
*) Hfeckel, op. cit. II, pag. 200, III. Taf. 32. Fig. 5 a—5 f, Taf. 40, Fig. 1—8.
<< prev. page << föreg. sida << >> nästa sida >> next page >>
