1902] The Holotlmrioidea of Northern Norway 



7. Phyllophoriis drumniondii (Thompson). 



In NoRDGAAED^s collectioiis tliere is a specimen, which may 

 be referred to this species. It was caught in Malangen Fiord tlie 

 ^Vi 1899 at a depth of 100 — 200 m.; bottom clay and rocky; 

 temperature + 3.7° C. Others have mentioned the occurrence of 

 this species in the most northern parts of Norway, for inst. M. Saks 

 (1861) and 0. Bidenkap (1899). In East Finmark it is not known. 



As Théel (1886) also points out, the difterences between this 

 species and the preceding one are of rather doubtful value. Fh. 

 2)ellucidus is said to be more transparent, often red, and to have 

 calcareous bodies in the skin. As to Fh. drummondu, the skin is 

 said to be thicker and non transparent, its colour white or yellow- 

 ish, besides being without calcareous bodies. I have, myself, in 

 the Trondhjem Fiord collected numerous specimens of FJujllophorus, 

 but they were so varied in colour, and their skeletons were in such 

 various stages of development, that I found the above mentioned 

 characteristics useless. But when examining specimens from different 

 parts of Scandinavia, I have found not so very few differences, as 

 regards the building up of the calcareous ring, as well as in the 

 size and shape of the calcareous bodies. 



As to whether many species exist, or only two, or perhaps only 

 one *with many varieties, I will not at present give any decided 

 opinion. 8till in certain places there seems to exist two, externally 

 quite dift^erent kinds, for instance in the Sound, accordiug to a 

 statement of Docent E. Lonnberg. Until more comprehensive in- 

 vestigations have been made, I think it will be wisest to retain the 

 names, as I have done here, of the two species Fh. pelhicidiis and 

 Fh. drummondii. 



As can already be inferred from statements by Ljungman 

 (1879) and Théel (1886), the number of tentacles in both these 

 species differs very often from that, which should be characteristic 

 of the genus Fhyllophorus. In certain places the tentacles, even in 

 most of the specimens, seem to number only 15. Such specimens 

 should be referred to the genus Orcida, but this genus must, as I 

 have formerly (1898 a, p. 103) stated, be united with the genus 

 Fhyllophorus, and thus Orcula barthii Troschel, as well as Orcula 

 lumincsa Lampert, must disappear, if, as from the descriptions may 

 be concluded, these differ from Fhyllophorus drummondii and Fh. 



