MARINE ALGA! OF BEAUFORT, N.:C. 515 
Cold and temperate North Atlantic and Pacific, reported on our coast as far south as Charleston, S. C. 
One specimen, Bogue Beach, Beaufort, N. C., April, 1908. 
This species will not be mistaken for any other in our region, being easily recognized by the com- 
pletely corticated fronds. Several varieties have been described. 
3. Ceramium strictum Harvey. Pl. CXI, fig. 3. 
Ceramium strictum, Harvey, 1849a, p. 163 (in part and excluding synonyms, not Gongroceras strictum Kuetzing). 
Ceramium strictum, Farlow, 1882, p. 136. 
Ceramium strictum, De Toni, 1903, p. 1484. 
P. B.-A. Nos. 347, 846. 
Frond capillary, tapering toward the apices, forming more or less dense tufts, usually 2 to 15 cm. tall, 
regularly dichotomously decompound with short lateral dichotomous branches scattered here and there; 
branches fastigiate, apices forcipate, lower segments 4 to 6 diameters long; cortex confined to a narrow 
band surrounding each node and extending a short distance over the internodes; remainder of inter- 
node naked; tetrasporangia occurring in single circles surrounding the nodes, immersed among the 
cortical celis; cystocarps lateral near the apices of branches, surrounded by a few rather elongated, 
simple, incurved branches; texture flaccid; color purplish pink. 
Temperate North Atlantic; Mediterranean. 
Beaufort, N. C.: Few specimens on Bogue Beach, February and March, 1909; very abundant 
throughout harbor and on Fort Macon and Shackleford jetties, o to 30 cm. below low water, April, 1908; 
fairly abundant throughout harbor and on jetties, May, 1907; on few specimens of Gracilaria confervoides 
from coral reef offshore, May, 1907; one specimen on Fort Macon jetty, July, 1908. 
This species varies considerably in the diameter of the frond, the color, and the amount of branch- 
ing, but good specimens will usually be easily recognized by the narrow bands of cortical cells and the 
single whorls of tetrasporangia around the nodes. It is the only species which has been observed grow- 
ing here in the spring. The only species observed in this region with which it is likely to be confused 
is C. tenuissimum (?), from which it is distinguished by its whorls of tetrasporangia and often by its 
narrower bands of cortical cells. Typical specimens of these species will not be mistaken for each 
other, but as the tetrasporangia of C. tenuissimum are sometimes borne in more or less of a semicircle, 
and those of C. strictum sometimes form incomplete whorls, some specimens will give considerable 
trouble in their determination. In C. strictum the naked internodes are often more conspicuous than in 
C. tenuissimum, being strikingly evident to the naked eye. 
This is the southern limit recorded for the species on our coast, but it probably extends farther south 
in the spring. In this region it seems to appear about February, reach its greatest development in April, 
and disappear about June, unless some of the small specimens found during the summer are stunted 
summer forms of this species. 
Besides the specimens referred to above, minute, undeveloped plants, insufficient 
for reference to any species, are found occasionally on other algze on Fort Macon jetty 
and on Bogue Beach. 
Order 4. Cryptonemiales. 
Cryptoneminz, De Toni, 1905, p. 1523. 
Carpogenic branches and auxiliary cells occurring separately in the thallus. The 
fertilized egg cell sends out through the tissue of the thallus more or less long, often 
branched filaments whose terminal or intercalary cells fuse with single auxiliary cells; 
thereupon these auxiliary cells develop gonimoblasts toward the surface or interior of 
the thallus, usually attached to a basal placenta; cystocarps usually immersed. 
KEY TO FAMILIES. 
Carpogonia and auxiliary cells formed on special secondary filaments, which develop 
branches forming upright, oval, or flask-shaped structures inclosing the reproductive 
cells, gonimoblast embedded in the thallus, forming several successive lobes 
. 1. GRATELOUPIACE4 (p. 516). 
