8 



HJALMAR BROCH. 



previous records lying between 3160 and 3710 metres, the 

 lower limits being now extended to, at least, 5500 metres. 

 Umbellula gracilis was taken on the southern edge 

 of the Faroe channel by the "Triton" 1 ) at a depth of 

 1032 metres (555 fathoms), and by the "Michael Sars" 

 on the eastern side of the Canaries in 1365 metres. 



The information regarding these deep-sea animals is 

 scanty, and although it may seem justifiable to assert 

 that most of the species of Umbellula have a limited 

 distribution, 2 ) there is no denying the possibility that such 

 a statement may be largely due to our defective know- 

 ledge of the abyssal region. 



Trondhjem, May 13th, 1911. 



Explanation of plate. 



Fig. 1. Umbellula Giintheri from Stat. 48, natural size. Dorsal view 

 of the living animal showing phosphorescence. 



Fig. 2. Umbellula gracilis from Stat. 41, half size, lateral view. 



Fig. 3. The same colony, showing the cluster of polyps from the other 

 side, magnified. 



!) Marshall 1. c. 1887, p. 142. 



2 ) KCkenthal und Broch: Pennatulacea (Wiss. Ergeb. der deutschen Tiefsee-Expedition auf dem Dampfer "Valdivia" 1898- 

 Bd. XIII, Lief. 2) 1911, p. 485. 



-1899. 



