er bortrevet, saa at Axen er blottet i en Udstrækning af 
30””, hvor Rachis er afbrækket, Fig. 8. Men da vi 
af det meget ufuldkomne Exemplar dog kan taa saamegen 
Oplysning, at vi med nogenlunde Sikkerhed kan bestemme, 
at denne Sofjer ikke kan henfores til nogen af de bekjendte 
Slægter, og da hertil kommer, at den synes at nærme sig 
en Overgangsform, have vi troet det af Interesse at be- 
skrive den, hvor ufuldstændig end Beskrivelsen nødvendigvis 
maa blive. 
Naar vi have nævnt en Overgangsform, saa skulle vi 
med nogle Ord begrunde dette. Vi have ikke iagttaget 
hos nogen Pennatulide en saadan Rigdom af Kalk som 
den, der findes hos Gunneria borealis. Sarcosomaet danner 
formelig en Kalkskorpe. Cellerne ere saa stærkt ineruste- 
rede af Kalkspikler, at det selv ved kaustisk Kalilud har 
sine Vanskeligheder at faa dem skilte fra hverandre, — og 
Polyperne ere saavel paa Krop som Tentakler i en over- 
ordentlig Grad opfyldte af Kalkspikler. Med Hensyn hertil 
har jo Gunneria adskilligt tilfælles med Gorgoniderne; og 
ser man hen til Spiklernes Form, især 1 Stilken, saa voxer 
jo Fællesskabet noget; men med alt dette have vi dog for 
os en udviklet Pennatulide, der nærmer sig meget til Pro- 
toptilerne og maa vel henføres til deres Familie, nemlig 
Protoptilidæ. 
Den hele Stump er 103”” lang, hvoraf Stilken udgjor 
52” og Rachis, forsynet med Sarcosoma, 15””. 
Efter de uudviklede Polypceller at dømme, hvilke 
væsentlig indtage den Del af Rachis, som er bevaret, danne 
de skjæve Rækker, der gaa fra Ventralfladen over paa den 
noget hvælvede Dorsalflade, som ganske indtages af Celler, 
Fig. 8. I hver Række er der 4—5 Celler, og i det yderst 
smale Rum imellem Rækkerne sees enkelte mindre Celler; 
men Zooider findes ikke. Disse uudviklede Celler variere 
noget i Størrelse; de ere fra 1—9”” lange og 0,6—1”” 
brede foroven med en liden Aabning, hvis fri Rand er for- 
synet med et forskjelligt Antal yderst fine Papiller, Fig. 8. 
Cellernes indre Veg er sammenvoxet med Sarcosomaet. 
Polyperne i disse Celler have en brunlig Farve, det 
vil sige Svælget og de 8 Gastralfilamenter ere brunlige: 
Strax ovenfor disse uudvik- 
udviklet Celle med 
Tentaklerne ere rudimentære. 
lede Celler sees til Venstre en næsten 
sin Polyp, Fig. 8, a, og lidt længere oppe paa Dorsalsiden 
sidder den eneste, fuldt udviklede Celle med Polyp, som 
findes paa dette i hoi Grad defekte Exemplar, Fig. 8, 0. 
Den udviklede Celle er 3”” lang, dens Aabning, hvis 
fritstaaende Rand er forsynet med 8 tykke Papiller (Tænder), 
er 2,5”. Fig. 9, a. Cellens indre Veg er forstørstedelen 
sammenvoxet med Sarcosomaet; men Randen er fri og 
rager lidt ud fra Rachis. 
59 
polyp, owing to the sarcosoma above being torn away, so 
that, the axis becomes exposed for a length of 30””, and 
the rachis is then broken off (fig. 8). But, as the incom- 
plete specimen affords so much information, that we are 
able with considerable certainty to satisfy ourselves that 
this sea-pen can not be assigned to any of the known 
genera; whilst, to this, comes to be added, that it appears 
to approach to a transition-form; we have thought it of 
sufficient interest to be described, however incomplete the 
description must of necessity be. 
As we have mentioned that it approaches to a tran- 
sition-form, we will in a few words substantiate this. We 
have not observed in any Pennatulida such an 
is found in Gunneria borealis. 
The 
so strongly encrusted with calcareous spicules that, even, 
abundance 
The sar- 
cells are 
of calcium as 
cosoma forms, in fact, a calcareous crust. 
on treatment with a solution of caustic potash, it is no 
easy matter to separate them from each other, and the 
polyps, both, on the body and the tentacles, are filled up im 
In this 
with 
an extraordinary degree, with calcareous spicules. 
respect Gunneria has much in 
Gorgonde, and if we regard the form of the spicules, 
indeed, common 
especially, on the stem, the resemblance becomes still more 
prominent, but, nevertheless, we have before us a developed 
Pennatulida which approaches, much, to the Protoptili, and 
must, without doubt, be assigned to their family, namely, 
Protoptilide. 
The entire fragment measures, 1037” in length; of 
this, the stem occupies 52””, and the rachis — furnished 
with sarcosoma — 15””. 
Judging from the appearance of the polyp cells 
which, principally, oceupy the portion of the rachis that 
is preserved, they form crooked series, proceeding from 
arched dorsal 
In each 
the ventral surface over to the somewhat 
surface, which is quite occupied by cells (fig. 8). 
series there are 4—5 cells, and in the extremely narrow 
space between the series, a few smaller cells are seen, but 
no zooids are found. These undeveloped cells vary much 
in size; they measure from 1—2”” long, and from 0.6—1.0”” 
broad, above; and they have a small aperture, whose free 
margin is furnished with, a varying number of extremely 
minute papille (fig. 8). The wall of the cells is 
conereted with the sarcosoma. 
The polyps in these cells have a brownish colour, 
that is to say: —the gullet, and the 8 gastral filaments are 
brownish. The tentacles are rudimentary. Immediately 
above these undeveloped cells, a nearly developed cell with 
its polyp, is observed to the left (fig. 8, a), and a little 
further up, on the dorsal side, the only fully developed 
cell and polyp which is found in this highly defective spec- 
imen, is seen situated (fig. 8, b) 
The developed cell is 37” long, and the aperture is 
2.5 broad; whilst, the free independent margin is furnished 
with 8 thick papille (teeth) (fig. 9, a). The greater part 
of the wall of the cell is conereted with the sarcosoma, 
but the margin is free, and protrudes a little from the 
inner 
rachis. 
fa) * 
