io6 



MEDUSAE. I. 



Intosh 1890, p. 304), but no precise records are given. Hartlaub (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 Aurivillius (1897 98) records it from the Skagerrak. A. C. Jo- 

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



2OO meter 



600 



1000-.-- 

 2.000 -\ - 

 3000- \- 

 100C - - \ 



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

 Within the hatched region the species has a common occurrence. 



occurrence of Tima 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 

 the largest species among the Leptomedusae of the North-European waters is entirely restricted to a 

 comparatively small area. 



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

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

 140, 254, and 547 m. 



