M. normani'^). Man ser ogsaa tildels, at en kitintube 

 forlober langs en Ijifurkation paa samme niaatle. som frem- 

 stillet at' Noriuan (Notes on rare British Polyzoa. Quar- 

 terly Journ. Mie. 8c.. vol S. n. s.. tal). 5, fig. B). Mel- 

 lem rocltraadene (tulinlar tiltres, raiiical fibi'es) hos 31. fer- 

 natd. og kitintuberne hos de to andre arter er der neppe 

 nogen anden forskjel end. at de hos den første udspringer 

 nnder en ret vinkel, mens de hos M. jcjfreysii og M. nor- 

 iiiaiii ndspringer saa spidsvinklet, at de løber efter zoariet. 

 for hvilket tuberne saaledes tjener som et effektivt støtte- 

 apparat . 



Fra M. jeffreysu adskiUes mia art let ved sine store 

 frontavicularier og manglende operculuin. 



Det kan have sin interesse at stille sig for øie de 

 naturlige forhold paa de tre steder, hvor arten forekom: 



St. 31, TGo m.. sandler. t= ^ l.oQ C. 

 „ 200, 1134 - , ler . t= ^ l."U -■ 

 ,. 8-23. 408 - , ler . t= l.n5 - 

 Den er saaledes hentet op tra et dyb af 1154 meter 

 med iskoldt vand. og sammen med Kinetoskias arhorescens 

 deler den æren af at have levet i en afstand fra .sjøens 

 overflade som er større end iDOd meter. 



Koloniernes længde 3 — 6.") cm. 



Zoociemundingens længde 0.:! mm. 



— bredde 



Frontavicnlariets længde 

 Kitintubernes tykkelse 



0.24- 

 0.o:i(i 



0.14 

 -0.3 

 -O.or, 



Gen. Scrupocellaria. 



Scrupocellaria reptans. Linn. 



Cdhilariii reptans, Smitt, (24, III), p. 284, 318. tab. 17, 



fig. 37—41. 

 Scrupocellaria reptans, Hincks, Ci)- p. 52,- tal). 7, fig. 1 -7. 



Findested. Brandosund. 



Denne art vides ikke med sikkerhed at være obser- 

 veret i den arktiske del af vort land. M. Sårs (22) op- 

 forer vistnok Cdhdaria reptans som almiiideligt forekom- 

 mende i Havosund og ved Hammerfest, men det foreligger 

 sandsynligvis her en forveksling med Meiiipea ternata. 

 Baade NoiMiian og jeg har tåget arten i Trondhjemsfjorden, 

 men nordenfor er den endnu ikke fnmlen. 



I min fortegnelse har jepf tydet disse kitintuber som hvdroid- 

 rør (18, II. p. 11, tan. •>, Hg. .'). Dette er nok ikke rigtigt. 

 Vistnok tinder lauii ufti' ogsaa ledsagende liydroider saaledes 

 som angivet paa min ovencitcrcde tigur, men de egentlige 

 kitintnber udspri ger baado hos M. niirmani og M. jeffreysii 

 fra zoociernes ncdciste parti, og de maa saaledes kunne op- 

 fattes som svareTidu til rodti-aadene lios M. teniata. 



and M. norniaii/*}. A chitinous tube may also sometinies 

 be seen running along a l)ifurcation in the way described 

 by Xorman (Notes on Rare Biitish Polyzoa. Quarterly 

 Jouni. Micros. Sei., Vol. 8, n. s. Pl, V. fig. 6). There 

 is hardly any ditference between the radical fibres in M. ter- 

 nata, and the cliitinons tubes in the two otlier species, 

 except that in the first they sprin.Li' out at right angles, 

 while in M. jeffrei/sii and 21. norvnani they spring out at 

 such an aeutc angle that they follow the zoariuni, and thus 

 serve as an effective support. 



ily S])ecies is easily distiniiuished from 21. ji'ffreysii 

 by its large anterior avicularia and tlie al)sence of an 

 opereulum. 



It may be interesting to observe tlie natural eoudi- 

 tions in the three places where the species occurred. These 

 were as follows: 



St. 31, depth 7(:")3 m., sandy clay, temp. — !.0" 0. 

 „ 200. .. 1134 - , clay , „ — l.O» - 

 „ 323. .. 4(_)8 - . clay . „ l.o" - 



It has thas been brought up from a depth of 1134 

 metres, from ice-cold water; and it shares with Kinetoskias 

 arhorescens the honour of having lived at a distance of 

 more than 1000 metres below the surface of the sea. 

 Length of colony from 3 — (}.:> cm. 



Length of the aperture O.:'. mm. 



Breadtl) of the ,. (_».14 - 



Length of anterior avicularium from 0.24 — 0.3 

 Thickness of chitin tubes from 0.030 — 0.00 - 



Gen. Scrupocellaria. 



Scrupocellaria reptans, Linn. 



Cellularia reptans. Smitt (24, III), pp. 284, 318; Pl. XVII. 



figs. 37—41. 

 Scrupocellaria reptans, Hincks (8). p. 52; Pl. Vil. figs. i — 7. 



Occurrenee. Brandøsund. 



Tiiis species is not known with certainty to have 

 been observed in the arctic portion of Norway. M. Sårs 

 (22), indeed, specifies Cellularia reptans as of common oc- 

 currence in Havosund and at Hammerfest; but this is 

 probably through confounding it witli 2Ienipea ternata. 

 Both Norman and I have found the species in the Ti'ond- 

 hjem Fjord, but farther north it has not yet been found. 



ln my list, I have interpreted these chitinous tubes as hydroid 

 tubes (IS, II, p. 11; Pl. U, fig. .'>). This is not correct. It 

 is true that accomjtanying hydroids are often found as repre- 

 sented in my above-mentioned figure: but the true chitin tubes, 

 both in M. norniani and M. jeffreysii, spring from the lov\est 

 portion of the zoæcia, and might thus be supposed to ar.swer 

 to the root fibres in M. ternata. 



