HYDROIDA II 



47 



._._ iooo m. 



ZOO Ti. __. 6 oo m. 



Fig. XVIII. The distribution of Halecium murkatum (forma abyssalis -f ) in the Northern Atlantic. 

 In the- hatched regions the literature notes a common, although scattered occurrence. 



200 m. boom iooo m. zooom- 



Fig. XIX. The occurrence of Halecium labrosum in the Northern Atlantic. 

 In the hatched parts the occurrence according to literature is scattered, no accurate details as to localities are given. 



