XXV 



-^ Codiohim pusillum f. americana (in Phyc. Bor. Am. Nr. 869) is identical with 

 C. gregarium. 



^^ Including E. prolifera Fl. Dan. (cfr. Børgesen, 8). 



^' Specimens of Urospora collabens from Cumbrae and from New England 

 (Phyc. Bor. Am. Nr. 970) belong to U. Wormskioldii. 



** The specimens referred to Spongomorpha lanosa (Børgesen, 8, p. 513) be- 

 long to S. vernalis. 



