444 BULLETIN OF THE BUREAU OF FISHERIES. 
Beaufort, N. C.: Abundant September and October, 1905, Bogue Beach; occasional in later years; 
fairly abundant attached to shells and marine grasses between jetties at Fort Macon, occasional on 
jetties, August and September, 1906 and 1907; occasional on sea buoy and Shackleford jetty, 1906 and 
1907. Wrightsville Beach, N. C.; Fairly abundant in sound near inlet, August and September, 1909; 
abundant in almost pure masses on beach, August, 1909. 
This species was first observed at Beaufort on the beach in 1905, it appeared in the harbor in 1906, 
was fairly abundant there for two summers, and then seemed to disappear, not being recorded for the 
region in 1908.0r 1909. 
It reaches its northern known limit at Beaufort. 
Family 3. ELACHISTEACE Kjellman. 
Elachistacez, De Toni, 1895, D. 436. 
Frond minute, sometimes almost microscopic, epiphytic, forming a pad or tuft 
consisting of a horizontal and an erect portion; horizontal portion consisting of loose or 
more or less closely adherent, branched filaments, upright portion consisting of filaments, 
usually branched below, simple above, loosely grouped, or more or less densely com- 
pacted, sometimes forming an almost parenchymatous structure below; filaments mono- 
siphonous or polysiphonous, with longitudinal growth basal or lasting longest at the 
base; “unilocular’’ and “plurilocular” sporangia formed in the place of assimilating 
filaments, or by the transformation of single assimilating cells, or of offshoots from 
these cells. 
About 20 species, in all seas, especially in the North Atlantic Ocean. 
Genus Elachistea Duby. 
Elachistea, Duby, 1832, p. 339 (19). 
Elachista, De Toni, 1895, D. 439- 
Frond forming small pads or tufts showing horizontal and erect portions; horizontal 
portion composed of monosiphonous branched filaments loosely or closely aggregated; 
from this arises the erect portion, usually consisting of a basal layer and erect filaments, 
the basal layer composed of branched, mostly colorless, monosiphonous filaments more 
or less densely compacted, sometimes forming an almost parenchymatous structure, 
erect filaments monosiphonous, simple or sparingly branched below, moderately or 
greatly elongated, richly colored; ‘‘unilocular sporangia’ pear shaped, “plurilocular 
sporangia’’ filiform, usually consisting of a single row of cells, occasionally divided to 
form two rows of cells, both kinds of sporangia arising from the basal layer. 
About 15 species, widely distributed, but most abundant in the North Atlantic 
Ocean. 
Elachistea stellulata (Harvey) Griffiths. Figs. 20 and 2r. 
Conferva stellulata, Harvey, 1841, Pp. 132. 
Elachista steliulata, Griffiths, in Areschoug, 1843, Dp. 261. 
Elachisia stellulata, De Toni, 1895, D. 439. 
Thallus consisting of extensive endophytic filaments from which arise, here and there, external, 
hemispherical tufts of erect filaments and sporangia; internal filaments irregularly and profusely 
branched, frequently anastomosing, segmented, irregular in form and size, erect filaments and sporangia 
arising from a poorly developed basal layer, erect filaments 0.3 to 0.8 mm. long, 5 to 10 mic. wide, 
““ynilocular sporangia’’ obovate or pear shaped, about 25 by ro mic., “plurilocular sporangia’’ usually 
long, cylindrical, sometimes club shaped, obtuse, 30 to 50 by 5 to 10 mic. 
On Dictyota dichotoma, England. : 
Fairly abundant on Dictyota dichotoma dredged from the coral reef offshore, Beaufort, N. C., August, 
1914. 
