EUCERATOSA 341 



Spongia magellanica, Thiele. 



S. magellanica, Thiele, 1905, p. 483, figs. 18, 106. 



Occurrence. St. 156: South Georgia, 200-23601.; St. WS84: Falkland Islands, 75-74 m.; 

 St. WS 89: Tierra del Fuego, 23-21 m. 



Remarks. The fibres of the first specimen contain sand grains only, those of the 

 second specimen contain only fragments of sponge spicules. Otherwise the two 

 specimens are identical and both resemble the holotype closely. 



Distribution. Punta Arenas and Calbuco. 



Genus Duseideia, Johnston 

 Duseideia fragilis (Montagu), Autt. 

 Occurrence. St. i : Ascension Island, 16-27 ni- 



Remarks. The specimen is thinly encrusting, but resembles the European forms of 

 the species very closely in structure. 



A synonymy of this species will be given in my report on the Barrier Reef sponges. 

 Distribution. Practically cosmopolitan. 



Duseideia chilensis (Thiele). 



Spongelia chilensis, Thiele, 1905, p. 485, fig. 20. 

 Occurrence. St. WS 84 : Falkland Islands, 75-74 m. 

 Distribution. Chile. 



c b 



Fig. 41. Duseideia tenuifibra, sp.n. a, fibres near periphery of sponge; b, from near the base; 

 c, showing method of attachment of fibres to sand grains. 



14 



