Botto] 



171 



The Porsanger Fiord, 200 in., on a stone. 



Smitt (1. c, p. 75) calls attention to the fad thai the ectoeyst 

 in zooeeia and ooecia are thinner than in the foregoing form. 



In aretica there are in the ooeeia often transverse and longi- 

 tudinal lines oi' sutures, these too are mentioned by Smitt (1. c, 

 p. 74, pi. 24. fig. 33). Smitt also says that these lines sometimes 

 occur in the ooecia of majuseula, but I have not noticed them. 



It is easy to distinguish between the two species. With regard 

 to size, it may be mentioned that the zooezia in aretica arc 0.8 mm. 

 in length from the lower end to the tip of the oral denticle, and 

 the corresponding measurement in majuseula gives 0.5—0.6 mm. 

 Ooecia in aretica are rather oval, in majuseula they are approxim- 

 ately ballshaped, in both species they are punctured like a thimble, 

 but this is coarser in majuseula than in the other species. 



The perforation in the frontal wall of the zooeeia of majuseula 

 is closer than in aretica, where it is. indeed, somewhat different. 

 Hincks (1. c. pi. 14. fig. •_') lias illustrated the oral denticle as 

 being pointed, and I found some of them of this shape in the colony 

 which 1 had under examination. 



Operculum in aretica, 1 have not yet succeeded in isolating, in 

 majuseula, on the other hand, it has a characteristic form, which 

 also differs from the usual one in the genus Smittina (fig. 37). 



A very evideni difference between to two species is that the 

 zooeeia in majuseula are plainly separated, while in aretica they 

 more evenly merge into each other. 



This species is most likely exclusively arctic. In addition to 

 tho Porsanger Fiord, in Finmark. the following findingplaces are 

 mentioned, Spitzbergen, (Smitt). St. Lowrence (Hincks). 



Smittina smitti, Kikchenpadee. 

 pi. IV, fig. 24. 



The 0gs Fiord I. 100 m. 



In „Bryozoen des westlichen Norwegens", I used a new name 

 for this form. Smittia levenseni, as Kibchenpauer's name for Smitt's 

 Escharella legentilii, forma jirutnti/jut had quite slipped out of my 

 memory, notwithstanding that I made a note of it several years ago. 

 NormaxM here too made the necessary correction. I beg reference 

 to Norman's list of synonyms, at the same time remarking that 

 Schizoporella Harmsworthi, Waters, ought to be excluded from it. 

 in accordance with what I have previously pointed aut, that this 

 must be = Schizoporella reticulato-punctata, Hincks. 



Each zooecium has 6 — 8 lateral rosette-plates. As far as I 

 could see, the two upper ones were bi-pored and the two next ones 

 tri-pored. 



This species has not previously been found in Norway. 



Smittina jeffreysi, Norman. 2 ) 



The Porsanger Fiord. 70 m. 



The species was not previously found in Norway. 



Rhamphostomella sea-bra, (Fabr.), Smitt. 



(PI. V. figs. 8—11). 



1867. Cellepora scabra, Smitt (part.). Krit. fdrteckn., p. 30, pi. 



28, figs. 183— 1S5. 

 1886. Rhamphostomella scabra, Lorenz, Bryozoen von Jan Mayen, 



p. 93. 



x ) Finmark Polyzoa. p. 123. 



2 ) Eefer to synonyms in „Finmark Polyzoa", p. 120. 



Digermulen, on stone. 150 m.; The .lokel Fiord I. 100 m.; 

 The Porsanger Fiord. 70 m. 



Lorenz divided Smitt's Cellepora scabra into two species, and 

 as for as I can judge this division is perfectly justifiable. The 

 difference between them may be characterized as follows. 



/,'. costata has an oral denticle (pi. V. fig. 22) but in scabra it 

 is wanting. In costata the avicularian mandible is about half as 

 Ion- as it is wide, while in scabra the height is only very little 

 more than the width. 



The ooeeia in costata have usually more pores than those of 

 scabra have (cfr. figs. '■>. 21). The rostrum in the latter species is 

 shorter and blunter than in the former one. It is generally the 

 case too that the radial lines in costata are continued on the rostrum, 

 but this is nut often so in the case of scabra. Both species are 



punctured on the basal wall of the /. eium (fig. LO) but more 



closely in scabra than in costata. 



Bidenkap 1 ) has found //A. scabra in the Lyngen Fiord. So 

 that the species is now known from the coast of Finmark to 

 Lofoten. 



TZhamphostom&lla costata, Lorenz. 



(PI. V. figs. 21. 22). 



1867. Cellepm-a scabra, Smitt (part). Krit. forteckn., pag. 30, 



pi. 28, figs. 186 — Inn. 

 L886. Rhamphostomella costata, Lorenz, Bryozoen von .Ian .Mayen. 



p. 12 (94), pi. 7. ti^. 11. 

 1892. Rhamphostomella costata, Hincks, Polyzoa of St. Lawrence. 



Ann. and Mai.-'. Nat. Hist., ser. 6, vol. :]. p. 426, pi. 21. 



figS. 6 — 8. 



1900. Rhamphostomella costata, Waters, Bryozoa from Franz 

 Josef Land. p. 91, pi. 11. figs. 26, 27. 



Tromso. Mehavn (1894). 



Norman has taken this form in the Varanger Fiord, and 

 Bidenkap in Lyngen. The hitherto known southern limit for this 

 species is Troniso. 



Rhamphostomella plicata, Smitt. 



(PI. V, figs. 14. I. 'm 



1867. Cellepora scabra, forma plicata, Smitt, Krit. fort., p. 30, 



pi. 28, Ik's. 189. 191. 195. 

 ls77. Cellepora plicata, Hincks, Polyzoa from Iceland and 



Labrador. Ann. and Mag. Xat. I Int.. ser. 4. vol. 1'.). p. 



IOC. pi. 11. ties. ;>. 4. 

 1886. Rhamphostomella plicata, Lorenz, Bryozoen von .Ian Mayen. 



p. 12 ('.Hi. 

 1900. Rhamphostomella plicata, Waters, Bryozoa from F. J. 1... 



p. 92. pi. 11. ties. 28, 29. 



Nordkyn (1894), on an annelid tube. 



As is the case with costata, this species too has an oral den- 

 ticle, which is. however, Longer and narrower than in the species 



mentioned. 



The ooecium is as a rule provided with a few pores. I was 

 not able to discover any punctures on the back side of the colony. 

 It is therefore probable that Smitt's tie/. 190 does not represent 

 this species. 



■l Lyngenfjordens evertebral Banna. Tromse Mus. Aartb. 20, 1897, p. 92. 



