516 SUBANTARCTIC ISLANDS OF NEW ZEALAND. [Marine Algae. 



MiCROCOLAx, Schmitz, 1897. 

 Distribution. — As for species. 



Microcolax botryocarpa, Schmitz. 



Microcolax hotryocarpa, Falkenberg and Schmitz, Engler and Prantl's " Pflan- 

 zenfamilien," Algae, p. 458, 1897 ; Falk., " Die Ehodomelaceen," p. 357, 

 1901. 



The plant described by Hooker and Harvey in the " Flora Antarctica " as Poly- 

 sifhonia hotryocarfa was really a combination of a plant resembling a Polysi'pJionia 

 and a little parasite. The host plant has been described by Schmitz as Strehlocladia 

 neglecta, and the parasite as Microcolax botryocarpa. The parasite appears as little 

 bundles of filaments about J mm. high on all parts of the host. In the " Pflanzen- 

 familien " the distribution of the genus Microcolax is given as the Antarctic Ocean, 

 but there is no definite evidence that it has yet been collected elsewhere, except 

 the Auckland Islands. Its distribution, however, will probably be found to be the 

 same as the host. 



DiPTEROSiPHONiA, Schmitz and Falkenberg, 1897. 

 Distribution. — New Zealand, Australia, Brazil, Mediterranean Sea. 



Dipterosiphonia heteroclada (J. Ag.), Falkenberg. 



Polysiphonia dendritica, Hook. f. & Harv., Fl. Nov. Zel., ii, p. 232, 1855. P. 

 heteroclada, J. Agardh, Till. Alg. Syst., iv, p. 98. Dipterosifhonia hetero- 

 clada, Falk., " Die Rhodomelaceen," p. 320, 1901. 



* Antipodes Island; Cockayne (identified by Major Reinbold). (Also known 

 from New Zealand and (?) Australia.) 



As the specific name dendritica is preoccupied for the Brazilian Polysifhonia 

 {Dipterosiphonia) dendritica, C. Ag., it must be replaced by the specific name hetero- 

 clada, proposed by J. Agardh. 



Heeposiphonia, Naegeli, 1846. 

 Distribution. — Widely distributed, especially in warmer seas. 



Herposiphonia ceratoclada (Mont.), Falkenberg. 



Polysiphonia ceratoclada, Mont., Voy. au Pole sud, Bot,, i, p. 130, tab. 5, fig. 2, 

 1845 ; Hook. f. & Harv., Fl. Antarct., vol. i, p. 183, tab. 85, fig. 2, 1847. 

 Herposiphonia ceratoclada, Falk., " Die Rhodomelaceen," p. 313, 1901. 



Auckland Islands ; d'Urville, Hooker. 



Streblocladia, Schmitz, 1897. 

 Distribution. — As for species.(i) 



Streblocladia neglecta (Mont.), Schmitz. 



Rhodomela (?) botryocarpa (partim), Mont., Voy. au Pole sud, Bot., i, p. 140, 

 1845. Polysiphonia botryocarpa (partim). Hook. f. & Harv., Fl. Antarct., 



(^) There is another doubtful species from the Mediterranean Sea. 



