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VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
the ramulij and at the 2 or 3 last forkings of the frond, sur- 
rounded by well developed involucres; tetraspores immersed in 
the cortication, in no definite order. 
This seems to be the common form of C. rubrum of the Pacific 
coast of America, from Alaska to southern California; it may 
be that among the numerous forms of corticated Cerammm of 
European waters to which names have been given some one 
may be found like this, but none is known to the writer; it 
has not been observed on the Atlantic coast of North America. 
The lateral branching is less developed than in most forms of 
the species, sometimes being represented only by the very 
abundant short adventive ramull, all other branching being 
dichotomous. The forking is perfectly regular, distant at 
first, more and more frequent above, dense near the margin. 
The fronds are of moderate size at the base, uniformly diminish- 
ing, being very fine in the last forkings; as the two parts of each 
forking develop equally, the frond has an even rounded outline. 1 
C. TENUissiMUM (Lyngb.) J. G. Agardh. Setchell & Gardner, 
1903, p. 346; Harvey, 1853, p. 216; P. B.-A., No. 1298. 
Esquimalt, Harvey; Vancouver island, Lichtenthaler. 
C. strictum Harvey. P. B.-A., Nos. 347, 846. Departure 
bay, Macoun. 
C. califobnicttm J. G. Agardh. Setchell & Gardner, 1903, 
p. 346; P. B.-A., No. 447. Esquimalt, Harvey, as C. dia - 
phanum. 
C. codicola J. G, Agardh. Setchell & Gardner, 1903, p, 346; 
P. B.-A. No. 248. Amphitrite point, on Codium, Macoun. 
Microcladia borealis Ruprecht. Setchell & Gardner, 
1903, p. 346; Harvey, 1853, p. 210; P. B.-A., No. 48. Fuca 
strait, Harvey; Port Renfrew, Butler & Policy; Esquimalt, 
Port Holmes, Sooke, Macoun. 
M. coulteri Harvey, 1853, p. 209; Setchell & Gardner, 1903, 
p. 347; P. B.-A., No. 1489. Port Renfrew, Butler & Policy; 
Esquimalt, Harvey; Comox; Victoria, Macoun. 
M. californica Farlow. Setchell & Gardner, 1903, p. 347 ; 
P. B.-A., No. 548. Port Renfrew, Butler & Policy. M. borealis 
and M. coulteri appear to be abundant here, but M. calif ornica 
rare, and at its northern limit. 
r rhe report of C . cancellatum at Esquimalt, Harvey, has not been confirmed. 
