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.
74
Artskarakter for Ankyroderma Jeffreysii.
Legemet langstrakt, cylindrisk. Den haleformige
Forlængelse lang. Tentaklerne yderst smaa, forsynet med 3
Papiller, den midterste størst. Genitalpapillen stor,
fremragende. Kalklegemerne i Huden fremtræde under 3
Former : Ankere, fæstede til spateldannede Kalkstave,
gjennem-brudte Kalkplader med Krone, og ovale, vinrøde Legemer,
placerede i Grupper. Hudens Farve, naar Dyret er levende,
er grønlig, spillende i det violette med isprængte røde
Punkter. Kroppens forreste Ende har en hvid pentagonal
Ring, indenfor denne den hvide Mundskive med hvide
Tentakler. Genitalpapillen dels gulhvid, dels stærk gul; den
haleformige Forlængelse hvid.
Artskarakter for Ankyroderma affine.
Legemet cylindrisk. Den haleformige Forlængelse
kortere end hos .leffreysii. Tentaklerne yderst smaa med
3 Papiller. Genitalpapillen ikke fremspringende. Paa
Hudens Overflade temmelig regelmæssige Rækker af Ankere,
fæstede til spateldannede Kalkstave. Imellem disse dels
særegne Kalkgrene, fra hvis Fællesudspring (Midtparti)
hæver sig enten en treknoppet Krone eller en lang
Kalk-naal, — dels yderst forskjelligformede, gjennembrudte
Kalkplader med Krone, og i det dybere Hudlag en stor
Mængde farvefrie, mere eller mindre afrundede Legemer,
bestaaende af et Conglomerat af Kalkkorn eller
Kalkprismer. Huden grønlig; Mundskiven og Halespidsen hvid.
Foruden de af Professor Semper i hans Reiseværk
opstillede Slægter, henhørende til Molpadidernes Familie,
have. vi fundet det nødvendigt at opstille to nye Slægter,
hvis Hjem er de arctiske Have. Af Molpadider fra disse
existere (foruden de af os beskrevne), saavidt os bekjendt,
kun 3 Arter, hvoraf den ene blev fundet ved
Vest-Finmarkens Kyster, den anden ved Novaja Semblia og den
tredie ved Nord-Amerika; desforuden forekommer der ved
Kerguelens Land en Molpadide, nemlig Molpadia violacea,
Studer, som efter al Sandsynlighed er identisk med Sars’s
Molpadia borealis. Saavel denne som Molpadia oolitica,
Pourt., og Haplodadyla arciica, Marenzeller, maa henføres
til den af os opstillede Slægt Trochostoma.
Hvad der frembyder en særlig Interesse ved den al’
Specific charaoter: Ankyroderma Jeffrey8ii.
Body elongate, cylindric. Caudiform appendix long.
Tentacles exceedingly small, furnished with 3 papillae, that
in the middle largest. Genital papilla large, projecting.
The calcareous corpuscles in the skin occur in three
typical forms: as anchors webbed to spatulate calcareous
rods: as perforate calcareous plates with a corolla;
and as oval, vinous-red corpuscles, arranged in groups.
Colour of skin in living specimens greenish, bordering on
violet, freckled with reddish specks. The anterior
extremity of the body marked with a white pentagonal ring,
approximating which is seen the white oral disk with its
white tentacula. Genital papilla sometimes yellowish-white,
sometimes a vivid yellow; caudiform appendix white.
Specific Charaoter: Ankyroderma affine.
Body cylindric. Caudiform appendix shorter than
in Jeffreysii. Tentacles exceedingly small, with 3 papillae.
Genital papilla not projecting. On the surface of the
skin occur comparatively regular series of anchors,
attached to spatulate calcareous rods. Between the latter,
are seen characteristic calcareous branches: a three-knobbed
corolla, or a long calcareous spicule, springing from their
common origin (the central portion); also perforate
calcareous plates with a corolla, varying greatly in form; and in
the deepest tegumentary layer large’ numbers of colourless,
more or less rounded corpuscles, consisting of a
conglomeration of calcareous granules, or calcareous prisms. Skin
greenish; oral disk and tip*of caudiform appendix white.
Exclusive of the genera established by Professor
Semper in his "Travels" as belonging to the family
Mol-padidce, we have found it necessary to institute two new
genera inhabiting the Polar Seas. Three species only
of Molpadidce, Exclusive of those here described, have their
habitat, so far as wo are aware, in those regions, one of
Which has been met with off the coast of West Finmark,
the other on that of Nova Zemlja, and the third off the
shores of North America; a Molpadia occurs, too, off
Ker-guelen, viz. Molpadia wolacea, Studer, which in all
probability is identical with Sars’s Molpadia borealis. The
latter, no less than Molpadia oolitica, Pourt., and
Haplodadyla arctica, Marenzeller, must be referred to our new
genus Trochostoma.
The genus Ankyroderma has proved specially inter-
<< prev. page << föreg. sida << >> nästa sida >> next page >>
