MacMillan: OBSERVATIONS ON PTERYGOPHOKA. 725 



Anderson's List of California marine algae,* Pterygophora cali- 

 f arnica 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, f 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 J notes that the characteristic Lami- 

 narieas, Agarieae and Alarieae of the North Pacific " stop at 

 about Puget Sound which is the terminus of the isothere of 15, 

 but Costaria turnert'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 Pterygophora given 

 by Hervey in his Sea Mosses in the preparation of which he 

 had the assistance of Dr. Anderson. Pterygophora, therefore, 

 seems to have a somewhat wider range than the majority of the 

 North Pacific Laminariacese. 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 algae, with notes. Zoe, a : 220. 

 1891. 



t Orcutt, C. R. Flora of Southern and Lower California, 13. 1885. 



| Setchell, W. A. On the classification and geographical distribulion of the 

 Laminariaceae. Trans. Conn. Acad. g : 370. 1893. 



\ Hervey, A. B. Sea Mosses. A collector's Guide and an introduction to 

 the study of marine algae, 88. 1881. 



