46 ERYTHEA. 



cortex (several layers of cells) and that these outer layers 

 are ruptured transversely and split away loogitudinally from 

 the elongating inner tissue leaving an inconspicuous scar at 

 the base of the blade and a more conspicuous one at the top 

 of the stipe. 



The writer has noticed that essentially the same thing 

 happens in L. Farlowii Setchell and L. plaiymeris De la Pyl. 

 and hopes to describe the phenomenon in detail before long, 



Laminaria Farlowii Setchell occurs in abundance at San 

 Pedro and at Monterey according to Dr. Anderson. It is not 

 common about San Francisco. De Toni says that this species 

 is known to him only as a manuscript name in Dr. Anderson's 

 List of the Marine Algae of California (Zoe, 2; 220, 1891). 

 It was described by the writer in 1893 (cf. Proc. Conn. Acad., 

 9; 355) in his paper "On the Classification and Geographical 

 Distribution of the Laminariaceae," a reprint of which was 

 sent to the management of " La Nuova Notarisia " and 

 acknowledged (ser. iv. p. 402, 1893). 



Thxdassiophyllum Clathrns (Gmel.) P. & R. is a Behring 

 Sea species whose occurrence on the Californian coast has 

 not been, so far as the writer knows, certainly recorded. De 

 Toni gives California in the list of localities and cites Dr. 

 Anderson as authority but the only reference is to Dr. Ander- 

 son's " List " and in that the note appended to the species 

 reads: " probably in California" (cf. Zoe. 2; 220, 1891) 



Cosiaria reticulata Saunders was described from the coast 

 of California in the Botanical Gazette for 1895 (20; 54-58, PI. 7) 

 having been obtained at Monterey. The plant differs from 

 the other Costarias, of which two were recognized in the 

 paper, by having a single broader or narrower " midrib " 

 (the rest of the blade being reticulated) instead of the three 

 to five narrow longitudinal ribs which the characters of the 

 genus Costaria require. Such a Costaria as this is certainly 

 very anomalous and requires that the original conception of 

 the genus should be very much modified in order to include 

 it. De Toni (loc. cit.; 362) refers to the plant doubtfully 

 under Costaria and says that it recalls Dictyoneuron Cali- 

 fornicnm Rupr. 



Through the kindness of Mr. Saunders, the writer has been 



