MacMillan: OBSERVATIONS ON PTERYGOPHORA. 725 
Anderson’s List of California marine alge,* Plerygophora cali- 
fornica is recorded as ‘‘common or occasional to all the Cali- 
fornia coasts.” The southernmost record of its occurrence that 
I have happened to find is in Orcutt’s Flora of Southern and 
Lower California.t The plant is here credited to San Diego, 
based upon collections by Daniel Cleveland. The northernmost 
point from which specimens have been taken seems to be Port 
Renfrew, Vancouver Island, B. C., giving the plant a range of 
over 16° of latitude. It very probably, however, extends up 
the Alaskan coast. In some observations upon the distribution 
of Pterygophora, Setchell t notes that the characteristic Lami- 
nariee, Agariee and Alarieze of the North Pacific ‘‘stop at 
about Puget Sound which is the terminus of the isothere of 15°, 
but Costarta turner? Grev. and Alaria esculenta (L..) Grev. con- 
tinue to Monterey, nearly to the 20° line, although they are 
found only at ‘ exposed points.’ . . . An interesting case is that 
of Pterygophora californica Rupr. which is reported by Dr. C. 
L. Anderson as growing at Monterey all the year round, but is 
reported by Mr. Daniel Cleveland as occurring at San Diego 
only from February until May and in deep water.” This state- 
ment seems to be based upon the account of Plerygophora given 
by Hervey § in his Sea Mosses in the preparation of which he 
had the assistance of Dr. Anderson. Plerygophora, therefore, 
seems to have a somewhat wider range than the majority of the 
North Pacific Laminariacee. The plants collected at Port Ren- 
frew were so abundant and robust that I am inclined to think 
that the region of maximum development may be along the 
British Columbian rather than along the Californian coast. 
Ruprecht’s plants were Californian; those of Areschoug were 
from the vicinity of Monterey, as was also the specimen of 
Hervey: the specimens of Cleveland from San Diego do not 
seem to have been recorded as of unusual size. The plants of 
Port Renfrew, some of them with trunks nearly three inches in 
diameter and eight feet in length, exceed the recorded measure- 
ments and indicate thus a particularly luxuriant growth in that 
* Anderson, C. L. List of California marine algze, with notes. Zoe, 2: 220, 
1891. 
7 Orcutt, C. R. Flora of Southern and Lower California, 13. 1885. 
t{Setchell, W. A. On the classification and geographical distribution of the 
Laminariacee. Trans. Conn. Acad.g: 370. 1893. 
2 Hervey, A. B. Sea Mosses. A ccllector’s Guide and an introduction to 
the study of marine alge, 88. 1881. 
