M.'- ol- - ,^- 



Faiii. Membraniporidae. 



Geil. Membranipora. 

 Membranipora cornigera. liusk. 



Memhranipoiu fleininf/i/ /. coniii/era. Smitt (24, 111), p. 3()7, 



tal). 24. tig. 1. 

 Membianipora coniif/era, Hincks (81. p. 164, tab. 21, tiji. 



4: tab. 22, fi-. 3. 



Pindested. St. 29U. 



Hincks (8, p. Ifi5) angiver kun tre findesteder for 

 denne art, nemlig Shetland. Outer Haaf, off the coast of 

 Norway. Heraf fremsiaar. at arten er yderst sparsom i 

 sin forekomst. Ved de gafieldelte pigger i mundingen er 

 den saa let iyendelig, ,at oveiseen og forveksling ikke godt 

 kan linde sted. 



Faiii. Membraniporidæ. 



Gen. Membranipora. 

 Membranipora cornigera, Busk. 



Meiitbraiiipt;iajl(ni/iii/i/j. ronuf/fia, Smitt (24. III), p. 3Gi 



Pl. XXIV. fig. 1. 

 Membranipora cornigera, Hincks (8), p. 1()4; Pl. XXI 



tig. 4; Pl. XXII, fig. 3. 



Occurrence. Station 2'.tu 



Hincks (8, p. 165) meiitions oiily threc places where 

 tliis sjjecies lias been found, viz. Slietlaud Isles, Outei 

 Haaf, and ofl" tlie coast of Xorway. From this it apjjean 

 that the sjjecies is of extreinely rare occurrence. It is se 

 easily recognisable by the forked spines at the mouth 

 tliat it could not well be overlooked or mistaken. 



Membranipora arctica. D Orb. 



Menibraiiipora lineafa f. sophiae. Smitt (24. 111). p 36.5, 



tab. 20, fig. 24, 2.'). 

 Meiiiliniii'p(ira arctica, Lorenz (16), p. 85. tab. 1. fig. 1. 



Findested. Norskoerne (Spitsliergen). 



Arten dannede et sortagtig overdrag paa snegleskal. 



Membranipora arctica. n'Oib. 



Membranipora lineafa, f. sopliiæ, Smitt (24, III), p. 3G5 



Pl XX, figs. 24, 25. 

 McmbranijKiya arctica. Lorenz (16). p. 85; PI. I, fig. 1. 



Occurrence. Xorwegian islands (Spitsbergen). 



Tliis s|)i'cies formed a blackish coating upon snail 



Shells. 



Membranipora spitsbergensis. Smitt. 



SemiflnshrJIa arctica. D'Orl). (manuscript). 



Membranipora arctica. Smitt (24, III), p. ;U)7, 413, tab. 



20, fig. 33—36. 

 Meiiihranipora spitt^bergensif, Bidenk.ip (I', p. (iUI. 



Findested. Xorskøernc. 



Denne form, som let kjendes ved sin karakteristiske 

 bagside (Smitt, I. c., fig. 34) er hidtil kun funden ved 

 Spitsbergen. Membranipora arctica har jeg tåget paa for- 

 skjellige steder i Finmarken, men dm er ikke observeret 

 saa langt syd som ved Storbritaniens kyster. 



Membranipora spitsbergensis. Smitt 



SemiJinstreUa arctica, D'Orl). (manuscript). 

 Meinlnrniipora arctica, Smitt (24, III), pp. 367, 413; PI 



XX, figs. 33—36, 

 Membraiiipara /^j^tshergensis, Bidenkap (1), p. 619. 



Occurrence. Xorwegian islands. 



This form. which is easily recognised by its charac 

 teristic back (Smitt, 1. c, fig. 34), has hitherto been founc 

 only at Soitsbergen. I have found Mrmtiranipora arcticfi 

 in several places in Finmark, hut it has not been observed 

 as far snuth as tiie shores of Great Britain. 



Den norske N"<ir(lhavsexpedition. O. Nordgaard: Polyzoa. 



