NO. 1 TAYLOR: PACIFIC MARINE ALGAE 43 



Ulva fasciata Delile^^ 



Farlow 1902, p. 90. 



Reported from I. Isabela, Archipielago de Colon. However, see the 

 discussion of U. lobata. 



Ulva lobata (Kiitzing) Setchell & Gardner 



Kiitzing 1856, p. 10, pi. 27 (as Phycoseris lobata) ; Setchell & Gard- 

 ner 1920, p. 268; Smith 1944, p. 46, pi. 4, figs. 4, 5. 



These plants could not be differentiated from those judged to be young 

 U. dactylifera Setch. & Gard. except arbitrarily, on thickness. Neither 

 group of specimens is very different from certain phases of U. fasciata 

 Delile of the Caribbean which Setchell (in Phyc. Bor.-Amer.) at first 

 considered to be an element of the California flora. Later (1920, pp. 284, 

 285) he segregated these plants under U. lobata and U. dactylifera, the 

 latter in its full development, but not in its earlier phases, rather distinc- 

 tive. 



Mexico: Guerrero, littoral at Ba. Petatlan, no. 34-575, 2 Mar. 

 1934. Ecuador: Archipielago de Colon, I. Santa Cruz, Hassler no. 

 1001, June 1872. Guayas, in tide pools at Pta. Santa Elena, Schmitt 

 nos.512,516, 17 Sept. 1926. 



Ulva dactylifera Setchell & Gardner? 



Setchell & Gardner 1920, p. 272, pi. 21, fig. 1. 



These plants differ very little from those here assigned to Ulva lobata 

 Kiitz., except in thickness. Setchell and Gardner set limits on the thick- 

 ness of U. lobata of 45-90 /x. In its early phase of growth U. dactylifera 

 has about the same shape as U. lobata, but later develops the erect linear 

 crisped lobes which characterize it. Setchell and Gardner state that it 

 reaches 2-4 cm in height in the first growth stage, but authentic material 

 is as much as 6 cm tall. Specimens in the Galapagos collections apparently 

 in this growth phase reach 9 cm in height, 110-123 fi in thickness, but 

 none have developed the characteristic long crisped lobes of the later 

 phase. 



Ecuador: Guayas, scraped from a mooring buoy at La Libertad, 

 Schmitt no. 12 J -33, 19 Jan. 1933. Archipielago de Colon, dredged at 

 sta. 146, L Isabela, no. 34-109, 12 Jan. 1934. Ibid., infrequent at Black 

 Beach Anchorage, I. Santa Maria, no. 34-227, 17 Jan. 1934. 



^2 This and subsequent similar references to Farlow's 1902 paper on Galapagos 

 Islands algae are designed to include certain records which are neither confirmed 

 by our own collections nor interpreted satisfactorily from his specimens. 



