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 alge, and erect secondary filaments arising from these; 
secondary filaments sometimes lacking, the upright portion consisting of only sporangia 
15 
Fig. 12.—Sireblonema solitarium, internal filaments branched 
and anastomosed, X 277, 
Fig. 13.—Sireblonema solitarium, internal filament bearing 
hair and ‘‘plurilocular sporangium,” 277. 
Fig. 14.—Sireblonema solitarium, terminal 
sporangium,”’ X 277. 
Fig. 15.—Streblonema soliiarium, long external filaments and 
lateral “ plurilocular sporangium,’’ X 277. 
Fig. 16.—Streblonema invisibile in Meristotheca duchassaingit, 
internal filaments bearing “‘plurilocular sporangia” of various 
ages and one hair, X 206. 
“plurilocular 
and hairs; branches of the decumbent filamen 
18 
Fig. 17.—Streblonema invisibile in Meristotheca duchassaingii, 
internal filament bearing “pluriloctilar sporangia’’ of various 
ages, X 206. 
Fig. 18.—Streblonema invisibilein Meristotheca duchassaingit, 
internal filament bearing “plurilocular sporangium” and hair, 
X 206, y 
Fig. | 19.—Sircblonema invisibile, ‘‘plurilocular sperangia,’”’ 
X 206, 
ts usually free, not anastomosing; sporangia 
usually occurring singly, subsessile on the decumbent filaments or terminal or lateral on 
short or long upright filaments; “unilocu 
lar sporangia’’ subglobose, rather large; 
“plurilocular sporangia’’ various in form, sometimes conspicuously branched, consisting 
of one or, for the greater part, many rows of 
of “plurilocular sporangia” not known. 
cells in the longitudinal direction; products 
About 20 species, in other alge, North Atlantic and Mediterranean. 
