io6 



MEDUSA. I. 



Intosh 1890, p. 3041, but no precise records are given. Har tlanb (1894, p. 196) has found it at Heligo- 

 land. Broch (1905, p. 7) records it from the Sondeledfjord on the Norwegian coast of the Skagerrak. 

 In the International Plankton Catalogues (1906 and 1908) it is recorded from various localities in the 

 eastern part of the Skagerrak. Also Auri\-illius (1897 — 98) records it from the Skagerrak. A. C. Jo- 

 hansen and Chr. Levinsen (1903) have mentioned it from tlie Kattegat. No other records as to the 



Chart XIV. Occurrence of Tinia bairdii Fewkes. o Occurrence according to the literature 

 Within the hatched region the species has a common occurrence. 



occurrence of Tiwa bairdii are found in the literature. Thus it seems certain that it does not occur 

 north and west of the North Sea. It is very remarkable and interesting that the distribution of one of 

 tlie largest species among the Leptomedusse of the North-European waters is entireh restricted to a 

 comparatively small area. 



Tima bairdii may be found at different depths. Most frequenth- it has been found in the upper 

 water layens, but in the Skagerrak it has been found near tlie bottom at considerable depths, viz. 105, 

 140, 254, and 547 m. 



