54 



MEDUSA. I. 



fact, in such younger specimens we usually find every possible transitional stage of development be- 

 tween the smallest and the fully developed tentacles. 



Material (see Chart V): 

 North -East Iceland: 



i) — Lat. 66°io' N., Long. i4°29' W., near Langenses. August 13th 1904. Surface. "Thor" stat. 

 253 (04). — Specimens in the collection of the Plankton Laboratory, Copenhagen. 



Chart V. Occurrence of MeliCfrtnm octocostatiuii M. Sars. O Occurrence according to the Hterature. 

 In the hatched regions the species is comnionly occurring. 



2) — Lat. 66° 1 7' N., Long. i4°27' W., near Langenses. July 20th 1904. Depth 77 ni. Young-fish 

 trawl, 80 m wire. "Thor" stat. 203(04). — i specimen, height 6 mm, diameter 7 mm. 



3) — Lat. 66°25' N., l^o"g- i4°5i' ^V-. "ear Langen^s. August 14th 1904. 70 m wire. "Thor" stat. 

 257 (04). — Specimens in the collection of the Plankton Laboratory, Copenhagen. 



4) — Lat. 66''46.5' N., Long. i4°57' W. August 20th 1904. Depth 102 m. "Beskytteren", Gemzoe. 

 — I specimen, height u nun, the apical jelly ^ mm. 



