MARINE ALG OF BEAUFORT, N. C. 499 
KEY TO SPECIES. 
Coty dakjay er sitol i loynzhs (Slee 6) [a) 142s ileal leper foesle: Neen malar etna nether tea rane 4s b. 
Bee DOTA IGS COTE SIE TICE aaa le cee ie BO save aia an tye wiagnie eve 3. C. tenuissima (p. 500). 
bb. Fronds coarse, robust, densely branched .........................005. 1. C. atropurpurea (p. 499). 
bbb. Fronds coarse, robust, loosely branched ............. 20-2200 c cece eee ees 2. C. littoralis (p. 499). 
aa. Apices of branches forming crateriform depressions........... 0.05.0 .0 0 cece cee ee ceccuceueesees Cs 
c. Fronds coarse, rigid, brittle, branching sparse below, often dense above, color dark 
reddish) purple 2, SUSU sO0. 0. CFs. ee ae ey, Cote Ries v7 eas tena 4. C. dasyphylla (p. 500). 
cc. Fronds of moderate coarseness, flexuous, branching uniformly profuse, color pinkish 
SEL UW relat was acetate cl eantenin alse minrajois’ se, steisieeivinie ele ass ayeterata cis spe RR eee ERIN cE 5. C. sedifolia (p. 501). 
1. Chondria atropurpurea Harvey. 
Chondria atropurpurea, Harvey, 1853, p. 22, pl. 18 E. 
Chondria atropurpurea, De Toni, 1903, p. 831. 
Fronds robust, rather coarse, 5 to 26 cm. tall, 0.7 to 2 mm. in diameter in main stems, rather pyrami- 
dal in outline, densely, irregularly, alternately branched, main branches elongated, spreading, sometimes 
virgate, sparingly beset with secondary branches and branchlets, longer and shorter branches inter- 
spersed without order, the ultimate branchlets and usually the secondary branches tapering at each end, 
having the apices prolonged and being markedly constricted at the base, branchlets arising singly or 
somewhat fasciculately from superficial depressions, spindle-shaped; tetrasporangia in the ultimate 
branchlets; cystocarps broad-ovate, sessile on the ultimate branchlets; texture cartilaginous, firm; 
color usually dark reddish purple, sometimes lighter and yellowish. 
South Carolina to Florida; Brazil; Japan. 
One specimen on shell between jetties, Fort Macon, Beaufort, N. C., August, 1906? 
To this species is referred with considerable doubt one specimen from Beaufort. ‘The species has 
not been observed elsewhere by the author, but should be included as it certainly occurs within our 
range, the type being from Charleston, $.C. The habit is similar to that of C. dasyphylla, from which it 
is distinguished by its prolonged apices and sometimes by its lighter color. The Beaufort specimen does 
not show the constrictions at the bases of the secondary branches, the marked constrictions at the bases 
of the branchlets, or the origin of the latter from superficial depressions, as is characteristic of the species; 
but resembles the species in other respects. If this determination is correct, this is the northern known 
limit of the species. 
2. Chondria littoralis Harvey. Figs. 36 and 37; Pl. CVII, fig. r. 
Chondria littoralis, Harvey, 1853, p. 22. 
Chondria littoralis, De Toni, 1903, p. 832. 
P. B.-A. Fasc. D, No. KCVIM. 
Frond robust, rather slender, 10 to 35 cm. tall, o.8 to 2 mm. in diameter in main stems, often pyram- 
idal in outline, irregularly or sometimes somewhat dichotomously loosely much branched, main branches 
elongated, flexuous, tapering, sometimes almost naked and virgate, sometimes more or less densely beset 
with secondary branches and branchlets, apices more or less prolonged, branchlets about 3 to 25 mm. long, 
more or less numerous, sometimes crowded, spindle-shaped, constricted at the bases and more or less 
prolonged at the apices; tetrasporangia borne below the apices of ultimate branchlets; cystocarps ovate, 
sessile on the ultimate branchlets; texture fleshy cartilaginous; color light straw red. 
Florida; West Indies; Mexico; Bermuda. 
Sometimes fairly abundant on Bogue Beach, Beaufort, N. C. 
The determination of the specimens referred to this species is made with some doubt, but the plants 
resemble, in most respects, specimens of this species in the herbaria visited, and seem to agree with the 
description of the species. Among these Beaufort specimens there is considerable variation, the habit 
being irregular or fairly regular, the branching being more or less profuse, and the apices being conspicu- 
ously prolonged, slightly prolonged, or sunken; the habit is usually open; two specimens from Bogue 
Beach, August, 1907, and August, 1908, respectively, have the habit of Gracilaria confervoides, bearing 
elongated branches arising regularly, and rather few, inconspicuous branchlets. Only tetrasporic fruits 
have been observed. Whether this determination is correct or not, the species may be expected within 
