440 



BULLETIN OF THE BUREAU OF FISHERIES. 



Genus 2. Streblonema Derbes and Solier. 

 Streblonema. Derbes and Solier, in Castagne, 1851, P- 100. 



Frond filamentous, monosiphonous, composed of decumbent primary filaments 

 living within the tissue of other algae, and erect secondary filaments arising from these; 

 secondary filaments sometimes lacking, the upright portion consisting of only sporangia 



Fig. 17. Streblonema im-isibile in Meristotheca duchassainyii, 

 internal filament bearing " plurilocular sporangia" of various 

 ages, X 206. 



Fig. 18. Streblonema im-isibile in Meristotheca duchassaingii, 

 internal filament bearing "plurilocular sporangium" and hair. 

 X 206. 



Fig. 19. Streblonema invisibile, "plurilocular sporangia," 

 X2o6. 



Fig. 12. Streblonema solitarium, internal filaments branched 

 and anastomosed, X 277. 



Fig. 13. Streblonema solitarium, internal filament bearing 

 hair and "plurilocular sporangium," X 277. 



Fig. 14. Streblonema solitarium, terminal "plurilocular 

 sporangium," X 277. 



Fig. 15. Streblonema solitarium, long external filaments and 

 lateral " plurilocular sporangium, " X 277. 



Fig. 16. Streblonema mwfibile in Meristotheca duchassainffir , 

 internal filaments bearing "plurilocular sporangia" of various 

 ages and one hair, X ao6. 



and hairs; branches of the decumbent filaments usually free, not anastomosing; sporangia 

 usually occurring singly, subsessile on the decumbent filaments or terminal or lateral on 

 short or long upright filaments; "unilocular sporangia" subglobose, rather large; 

 "plurilocular sporangia^' various in form, sometimes conspicuously branched, consisting 

 of one or, for the greater part, many rows of cells in the longitudinal direction; products 

 of "plurilocular sporangia" not known. 



About 20 species, in other algae, North Atlantic and Mediterranean. 



