MARINE ALG OF BEAUFORT, N. C. 493 
composed of a single layer of large cells; tetrasporangia scattered over the surface of 
branches and branchlets among the cortical cells, triangularly divided; antheridia usually 
on separate plants, borne singly on the tips of short filaments which arise in branching 
clusters from the thallus cells; cystocarps scattered over the frond, ovate, opening by 
a conspicuous apical pore, arising from the base of the cavity, surrounded by a filamentous 
network, composed of several simultaneously or successively formed lobes, bearing 
numerous oblong or obovate carpospores from the outer segments of branched fruiting 
filaments, conglobate without conspicuous order, inclosed by a gelatinous covering. 
About 12 species, in warm and temperate seas. 
Champia parvula (Agardh) Harvey. Pl. CIV, fig. 4. 
Chondria parvula, Agardh, 1824, p. 207. 
Champia parvula, Harvey, 1853, p. 76. 
Champia parvula, Farlow, 1882, p. 156, pl. 15, f. 2, 5- 
Champia parvula, De Toni, 1900, p. 558. 
P. B.-A. Nos. 290, 592, 1934. 
Frond slightly flattened, o.5 to 1.5 mm. wide, 2 to ro cm. high, branching profuse, often intricate 
with coalescent branches below, branchlets arising alternately, oppositely, or verticillately, patent, 
apices tapering slightly, obtuse, bases sometimes slightiy constricted, segments of the frond barrel 
shaped, once or twice as long as broad; tetrasporangia scattered over the branches and branchlets; 
antheridia forming patches indefinite in extent, occurring sometimes as caps at the ends of branches, 
usually as bands around older portions of the thallus; cystocarps ovate, scattered, sessile on the 
branches; texture gelatinous-membranaceous; color light to dark pink, sometimes purplish or greenish. 
Warm and temperate North Atlantic; Mediterranean. 
Fairly abundant throughout harbor, on Fort Macon and Shackleford jetties, and on Bogue Beach, 
Beaufort, N. C., April, 1908, fairly abundant on coral reef offshore, May, 1907, and July to August, 
1915, Occasional in harbor, on jetties, andon buoysduringsummerandautumn, Ratherscarce in sound 
near inlet, Wrightsville Beach, N. C., July, 1909. 
This species may be distinguished easily by its hollow-tubular structure septate by transverse 
diaphragms at more or less evidently constricted nodes. 
Family 3. DELESSERIACE (Negeli) Schmitz. 
Thallus flat, very rarely filiform, sometimes perforate or reticulately fenestrate, 
simple or forked or lobed or proliferous in various ways, structure cellular, sometimes 
provided with midrib and veins; tetrasporangia triangularly divided, usually occurring 
in sori embedded in the locally thickened cortex, scattered over the thallus or occurring 
on special portions, usually regularly arranged and occurring on both sides of the thallus; 
antheridia, where known, occurring in small, roundish sori scattered over the surface, 
usually on both sides of the thallus, the antheridia being cut off directly from thallus 
cells and giving rise, by successive division, to several spermatia; carpogonia closely 
associated with cells which function as auxiliary cells; cystocarps rather prominent, 
sessile, scattered over the frond or occurring on special portions, opening by an apical 
pore, pericarp usually free from the small basal placenta, sometimes joined to this here 
and there by remnants of the filamentous network, gonimoblast more or less compact, 
composed of tufts of branched filaments, which arise from a large, basal stalk cell, are 
developed simultaneously or successively, are loose or compact, sometimes being grouped 
into lobes, and bear carpospores singly or in short chains or groups trom their apices. 
Nearly 200 species, in nearly all seas, principally in warmer, especially Australian, 
regions. 
