6o 



MEDUSA. I. 



describes the i6 "diadems", each containing 30 "pearly nodules"; he further mentions the high illumi- 

 nating power of the animal. The description is, however, rather short and not very exhaustive. 



In 1903 Browne described a species, Mitrocomella fiilva from Bergen and Plymouth, but in 

 1905 he states that it is identical with polydiademata^ of which species he gives, at the same time, a 

 new and more thorough description based on specimens from the Firth of Clyde (1905, p. 767). 



•^•^- ^q;^ Sk^ "?e^ 



Chart VI. Finds of Mitrocoma polydiademata (Romanes). O Occurrence according to the Hterature. 



Material (see Chart VI): 



1) — Off Trangisvaag, Faeroe Islands. May 14th 1904. Young-fish trawl at the surface. "Thor" 

 Stat. 80(04). — ^ specimen, about 13 mm wide. In the collection of the Plankton Laboratory, Copenhagen. 



2) — Lat. 59°54' N., Long. 4°34' E., near the coast of Norway south of Bergen. May 8th 1905. 

 Young-fish trawl, 65 m wire. "Thor" stat. 24(05). — i specimen, about 22 mm wide. 



3) — Lat. 56°o8' N., Long. o°i5' W., about 90 miles off the mouth of Firth of Forth. May 4th 

 1905. Young-fish trawl, 80 m wire. "Thor" stat. 16 (05). — 4 specimens, 10 — 14 mm wide. In the collection 

 of the Plankton Laboratory, Copenhagen. 



