448 BULLETIN OF THE BUREAU OF FISHERIES. 
Genus Stilophora J. Agardh. 
Stilophora, J. Agardh, 1836, p. 16. 
Frond filiform, branched, firm, cartilaginous, finally hollow in the lower portions; 
growth in length apical; central axis composed of a few (usually four to five) series of 
cells; apex surrounded by tufts of filaments, arising laterally; peripheral assimilating 
filaments segmented, differing among themselves in form, either covering the surface 
of the frond or occurring in groups here and there; “‘plurilocular sporangia” uniformly 
distributed or grouped in more or less definite sori. 
Four to five species in North Atlantic and Mediterranean. 
Stilophora rhizodes (Ehrhart MS.) J. Agardh. Pl. LXXXVII, fig. 2. 
Conferva rhizodes, Ehrhart MS., in Tumer, 1819, vol. 4, p. or. 
Fucus rhizodes, Turner, 1819, vol. 4, p. or. 
Stilophora rhizodes, J. Agardh, 1841, p. 6. 
Stilophora rhizodes, Harvey, 1852, p. 112, pl. 9 B. 
Stilophora rhizodes, Farlow, 1882, p. 90, pl. s, f. 4, pl. 6, f. 2 
Stilophora rhizodes, De Toni, 1895, p. 390. 
P. B.-A. No. 83. 
Frond much branched, usually regularly dichotomous with more or less abundant minute lateral 
branches, 8 to 30 cm. long, about 1 mm. diameter below, yellowish when living, brownish when dry; 
branches elongated, plainly tapering toward the apices; sori separate, scattered among the more or 
less extensive sterile portions of the cortex, ‘‘unilocular’’ and “ plurilocular’’ sporangia formed on different 
individuals. 
Temperate North Atlantic; Mediterranean. 
Beaufort, N. C.: Very abundant in Mullet Pond, on Shackleford Banks, May, 1907, April, 1908, 
loose or attached, lying in loose masses on the bottom; few specimens in tide pool in northwest corner 
of Town Marsh, May, 1907; one specimen in harbor north of laboratory, April, 1908. 
Specimens from different localities vary greatly in more or less conspicuous tufts of peripheral 
filaments and in abundance of minute branches on various portions of the thallus. The Beaufort 
specimens have tufts of peripheral filaments large and conspicuous and few minute branches. In 
habit it is between the typical form and forma contorta Holden, occurring in masses with branches 
slightly contorted and intertwined. At Beaufort it occurred, with the exception of one specimen, in 
tide pools that were considerably warmer than the water in the harbor, but were very muddy. This 
is the most southern station reported for the species on our shores, but it may be found farther south in 
the winter or spring. 
Family 6. SPOROCHNACE4 (Reichenbach) Hauck. 
Thallus usually filiform, sometimes narrow-band shaped, parenchymatous except at 
apices, where it is composed of tufts of free filaments; branching lateral, profuse, the 
branches in some cases differentiated into long and short ones; longitudinal growth 
trichothallic by a group of subterminal cells; only ‘‘unilocular sporangia’”’ known, these 
are obovate, ellipsoid, or ellipsoid-cylindrical, produced as lateral outgrowths of special 
short, simple, or branched filaments arising from superficial cells; sporangiferous filaments 
occurring in sori scattered over the frond or confined to special regions. 
About 20 species in warm and temperate seas, especially in the Australian region. 
Genus Sporochnus Agardh. 
Sporochnus, Agardh, 1820, p. 147. 
Frond filiform, solid, regularly branched on all sides, usually having sharply distinct 
long and short branches, apices crowned with a tuft of free filaments; sporangia pro- 
duced as lateral outgrowths uniformly distributed on short, more or less branched 
filaments with club-shaped branches and round pear-shaped end cells; sporangiferous 
