30 



Sagartia abyssicola (Phellia) Kor. et Dan. 



Tal>. III, Fig-. 1, 2. Tab. X. Fig. 4—7. 



Syn. Phellia abyssicola. Kor. et Dan. — Fauna littoralis Norvegiæ. 

 Heft. 3. 1877, Pag. 78, Pl. IX. Fig. 3, 4. 



Sagartia abyssicola, Verrill. Americ. Journ. Sienc. Vol. XXIII. 

 1882, Pag. 314. 



Sagartia abyssicola, Verrill. Bulletin of the Mus. of compar. 

 Zoology. Vol. XI. 1883— Sr., Pag. in, Pl. VI, Fig. I, 

 1 b, 1 c. 



Fodskiven snart ruml. snart aflang, antagende altid 

 Formen efter den Gjenstand, den har fæstet sig: til eller 

 omfattet ; hyppigst træffes den paa Conchylier af dels døde, 

 dels levende Fususarter. og; den omfatter da saa intimt 

 Skallen, at der er tydeligt Aftryk af denne paa Fodskivens 

 Underflade, Tab. III. Fig. 2. Imellem denne og Skallen 

 eller den Gjenstand, hvortil den ellers er fæstet, tindes 

 hyppigt afsat en brun. chitinagtig Membran, som bidrager 

 til at fæste Dyret end "stærkere til Gjenstanden. Fod- 

 skivens Rand er snart meget tynd og bugtet paa mange 

 Slags Maader, snart tyk og næsten lige. udeii Indbugt- 

 ninger. og dens Flade er ofte papirtynd, saa at Septalin- 

 sertionerne skinne igjennem. 



Kolumnen er indtil 60""" hoi. omkring; 50""" bred, 

 rund. tildels soileformig og noget indkneben paa Midten 

 hos mange Exemplarer, imedens andre ere ganske jævnt 

 cylinderformede, og dens nederste 4 Femtedele har en 

 brun. blod. slimet Skede. der væsentlig bestaar af grøn- 

 brunt Lerslam, og hvori Dyret trækker sig ind. Tab. III. 

 Fig. 2. Skedens Rand er lidt ujævn og tynd. Den nøgne 

 Del af Kroppen er næsten glat. yderst smal og forsynet 

 med en Mængde Cinclides. Paa yngre Dyr er den om- 

 talte Skede bestandig tilstede. Tab. III. Fig. 1 . og de 

 nærme sig saaledes stærkt Slægten Phellia; men paa fuld- 

 voxne Dyr mangler enten ganske denne slimede, med Ler 

 inkrusterede. Overhud. Tal). X. Fig. 4. eller findes kun 

 delvis. Tab. III, Fig. 2: ligesom Dyret ved at leve i 

 Observationskarret i nogle Dage skilte sig saagodtsom 

 aldeles ved denne Overhud. Kroppen viser sig da svagt 

 foldet paalangs, halvt gjennemsigtig, saa Insertionerne af 

 Septa sees. ng paa Foldernes hele Længde findes en stor 

 Mængde tætstaaende, aflange Cinclides. hvorigjennem paa 

 mange Steder udkastedes lange, spiralformede Acontier, 

 Tab. III. Fig. 2; Tab. X. Fig. 4. 



Paa unge Dyr er Overhuden stærkere, og naar de 

 kontrahere sig, faar Kroppens Overflade et stærkt knudet 

 Udseende; det er da yderst vanskeligt at iagttage Cin- 

 clides. som forovrigt ikke synes at være tilstede i saa 

 overordentlig stur Mængde som hos de voxne Dyr, hvor 

 den letteste Irritation, især paa Mundskiven. foranlediger, 

 at Acontier i handredevis udslynges meil Lynets Hurtig- 

 hed; Inddragningen foregaar ikke med samme Hurtighed. 

 ug det synes, sum om mange Acontier. efterat være ud- 



Svn. 



Sagartia abyssicola (Phellia) Kor. et Dan. 



Pl. III. figs. i, <>. Pl. X. fig. 4—7. 



Phellia abyssicola. Kor. et Dan. — Fauna littoralis Norwegiæ. 

 Heft. 3. 1S77. Pag. 78. PL IX. Fig. :;. 4. 



Sagartia abyssicola. Veril 



lss-j. Pag. ;;i4. 



Americ. Journ. Seien. Vol. XXIII. 



Sagartia abyssicola. Verill. Bullitin of the 3Ius. of compar. 

 Zoology. Vol. XI. 1883—1885, Pag. 4:.. Pl. VI. 

 Fig. 1, 1 1, 1 e. 



The pedal disc is sometimes round, sometimes oblong, 

 always assuming the same form as the object to which 

 it bas attached itself or embraced. It is met with most 

 frequently on the shells of inanimate. or animate 

 members of the fusus species, and it then embraces 

 the shell so intimately. that a distinct impression of it 

 appears on the under-surface of the pedal dise (Pl. III. 

 fig. 2). Between that and the shell, or the object other- 

 wise to which it is attached, there is generally found de- 

 posited a brown, chitinous membrane. which contributes 

 to attach the animal still finner to the object. The margin 

 of the pedal disc is sometimes very thin. and is undulated 

 in many ways; sometimes it is thick and almost even, without 

 undulations. and its surface is often as thin as a paper 

 sheet. so that the septal insertions shine through. 



The column measures up to 60""'" in height, and 

 about 50""" in breadth; it is round. sometimes columnar, 

 and in many specimens is somewhat constricted at the 

 middle. while others are quite uniformly cylindrical, 

 and the lowest four-fifths-part has a soft. brown, slimy 

 sheath. consisting principally of greenish-brown clay-slime, 

 into which the animal retracts itself (Pl. III. fig. 2). The 

 margin of the sheath is slightly uneven. and thin. The 

 exposed portion of the body is almost smooth, extremely 

 narrow. and is furnished with a multitude of cinclides. In 

 young animals the sheath mentioned is invariably present 

 (Pl. III, fig. 1), and they consequently approach niuch 

 to the genus Phellia , lutt in full-grown animals this slimy. 

 with clay encrusted. external covering, is either entirely 

 absent, or is only partially present (Pl. III. fig. 2). whilst. 

 also. the animal after living a few days in the glass vessel, 

 almost completely divests itself of this external covering. 

 The body then appears faintly folded. longitudinally. and 

 semi-transparent, so that the insertions of septa can be seen, 

 and on the entire length of the folds a great multitude 

 of compactly-placed oblong cinclides are found. through 

 which. in many places, long spiral-formed acontia are 

 projected (Pl. III. fig. 2. Pl. X. fig. 4). 



In young animals the external covering is stronger, 

 and when they contract themselves the external surface 

 of the body acquires a strongly nodulous appearance. It 

 then becomes extremely difficult to observe cinclides. which. 

 besides. do not appear to be present in such extraordinary 

 abundance as in the adult animals, where the slightest 

 irritation. especially on the oral disc. causes hundreds of 

 acontia to be projected with lightning-speed. Their 

 retraction does not take place so rapidly. and it seems 



