172 



0. Nordoaard. 



Rhamphostomella radiatula, Hincks. 

 pi. v, fig. 16, 17. 



1867. Cellepora scabra /. plicata, Smitt (part), Krit. fort. pi. 28, 



fig. 193. 

 1877. Lepralia radiatula, Hincks, Polyzoa from Iceland and 

 Labrador. Ann. and Mag. Nat. Hist., ser. 4, vol. 19, p. 

 104, pi. 10, figs. 9—14. 

 1886. Bhamphostomella radiatula, Lorenz, Bryozoen von Jan 

 Mayen, p. 13 (95), pi. 7. fig. 9. 

 Hammerfesl (1894); The Trold Fiord Sund, 40 m.; The North 

 Cape (1894); The Kjolle Fiord (1894). 



I found this species quite common on algae and hydroids which 

 I took on the coast of Finmark in the autumn of 1894. 



The zooecia are rather small, and the species is easily distin- 

 guished from the foregoing one, in that it wants the suhoral ro- 

 strum and by the presence of the peculiar elevated peristome, about 

 which Hincks (1. c, p. 104) very appropriately remarks that it has 

 „a very fantastic appearance". 



The species is now known from Labrador, Iceland, Spitsbergen, 

 Jan Mayen and Finmark. 



Rhamphostella contigua, (Smitt. 

 pi. V, figs. 18—20. 



1867. Cellepora ramulosa, forma contigua, Smitt, Krit. fort. p. 

 31, 189, pi. 28, figs. 198—201. 



The 0stnes Fiord, 50 — 70 m., on stone; Hammerfest (1894), 

 on stone; Breisund, 100 m., on a gastropod shell; Mehavn (1894), 

 on Balanus. 



The species of the genus Cellepora have characteristic opercula 

 with a more or less distinct proximal lobe as in the Schizoporella 

 species. 



The shape of the operculum in the above mentioned species 

 proves that it is quite impossible to look upon it as a variety of 

 C. ramulosa, it can, indeed, not be considered to belong to the 

 Cellepora genus. Neither is it a typical Rhampostomella, but I 

 retain it for the present under that genus, as I do not now know- 

 any more suitable place for it. 



The surface of the zooecia are quite even, occassionally there 

 is a suggestion of radial stripes. The young' zooecia have as a 

 rule 4 spines on the distal side of the oral aperture. The oper- 

 culum is more solid than in the other Rhampostomella species. The 

 mandible of the avicularia is not of the same shape either as is 

 characteristic of the other species which belong to the same genus. 



Cellepora tuberosa, D'Orbigny. 

 1867. Cellepora ramulosa, f. tuberosa, Smitt., Krit. fort. pp. 



31, 191. 

 1903. Cellepora tuberosa, Nordgaard. Die Bryozoen des west- 

 lichen Norwegens, p. 69, pi. 2, figs. 28 — 34. 

 Moskenstrommen; The Ostnes Fiord, 50—70 m.; The North 

 Cape (1N'.»4). 



Respecting this species, I beg to refer to what I have previ- 

 ously said in the paper written by me, which is quoted above. 



Cellepora nodulosa, Lorenz. 

 PI. Ill, figs. 21—24. 



1867. Cellepora ramulosa, f. avicularis, Smitt (part.), Krit. for- 

 teckn., p. 32, 194, pi. 28, figs. 207—210. 



1886. Cellepora nodulosa, Lorenz, Bryozoen von Jan Mayen p.. 

 14 (96), pi. 7, fig. 14. 



Kvaenangen II, 90 in.; The Jokel Fiord II, 80 m.; The Jokel 

 Fiord III, 100 m.; The North Cape (1894); The Porsanger Fiord; 

 Svserholt (1894); The Kjolle Fiord (1894); Mehavn (1894). 



The specimens from the places above mentioned answer, on 

 the whole, well to Lorenz's illustrations and description of C. no- 

 dulosa. 



The mandible of the avicularia (fig. 24) had a row of fine teeth 

 in the distal margin, and in the operculum b was > h (fig. 23). 

 On examining some old material of Cellepora specimens, I found 

 that the forms which I entered as C. pumicosa from Finmark in 

 my list of Norwegian Cheilostomata were really young colonies of 

 nodulosa. 



I am afraid that Norman and Waters have been guilty of 

 the same mistake, when they mention pumicosa respectively from 

 Finmark and Franz Josef Land. I do not think that 'pumicosa 

 occurs in Finmark. In addition to the places already mentioned, 

 I have determined specimens of C. nodulosa from the North Ocean 

 Expedition st. 223, 273, 363. 



Bidenkap has taken it in the inner part of the Lyngen Fiord. 



Cellepora ventrieosa, Lorenz. 



PI. III. figs. 26—29. 



"When I was working out the Bryozoa from the North Ocean 

 Expedition, I treated ventrieosa and inerassata as being the same, 

 as I supposed that the difference between the forms lay within the 

 limits of variation for the one species. After 1 had got more ma- 

 terial, however, I found that they must be treated as two separate 

 species, and this opinion is shared by Waters in his treatment of 

 the Bryozoa from Franz Josef Land. 



I have a typical C. ventrieosa (fig. 26) from Breisund in 

 Finmark. 



The zoarium probably never attains to such a decided bran- 

 ching as is the case in C. inerassata. The two species ran be 

 distinguished at once by the naked eye, as inerassata is compara- 

 tively smooth on the surface, the zooecia not reaching so far for- 

 ward from the colony as in ventrieosa. 



There were no vicarious avicularia on the specimens of C. 

 ventrieosa which Lorenz and Waters had at their disposal, but 

 they were present (tig'. 29) in my colony from Breisund. They are 

 different from those in C. inerassata, the greatest width of the 

 mandible of ventrieosa is about double that at the hinging joint, 

 while the corresponding mandible in inerassata is more evenly wide. 

 (Cfr. Waters, Bryozoa, from F. J. Land, pi. 12, fig. 13). 



The mandible in the oral avicularium is semicircular also in 

 ventrieosa (fig. 28), but it is considerably larger than in inerassata. 



C. ventrieosa is new to Norwegian fauna. 



( I llepora inerassata, Smitt. 



PI. Ill, fig. 25. 



Hammerfest (1894). 



Waters has called attention to the fact that Cellepora ineras- 

 sata. Lamarck and C. inerassata. Smitt are not identical. The 

 former is found in the Mediterranean and is supposed to be the 

 same as C. coronopus, S. Wood, while C. inerassata, Smitt has 

 proved only to have arctic distribution. It occurred in the material 

 which Mc Andrew collected in Finmark in 1856 and the species 



