NO. 2 DAWSON: MARINE RED ALGAE OF PACIFIC MEXICO 303 



Type: Holotype is Dawson 6576, Mar. 7, 1949, on sheet 59309, 

 including vial 4182, in HAHF. 



Type locality: Epiphytic on Gelidium in drift from the reef at 

 the entrance to Bahia Tortuga, Baja California, Mexico. 



Additional Mexican material: Pacific Baja Calif. — Osorio- 

 Tafall, Sept. 2, 1946, Roca Maria, off Isla Natividad; Osorio-Tafall, 

 Sept. 1, 1946, Isla San Roque; D. 9504, Punta Abreojos, Apr. 



This slender, epiphytic plant has been known for many years, but 

 without proper designation of name. There seems to be little doubt that 

 it represents an epiphytic variant of C. violacea whose type specimen 

 appears to have been saxicolous. Epiphytic material at hand from Santa 

 Barbara, Calif, seems to be somewhat intermediate between the type of 

 C. violacea and some of the slender variants from Baja California. 



Gallymenia ? pertusa Setchell & Gardner 



Setchell and Gardner 1924, p. 746, pi. 49, fig. b. 



"Fronds thin and flabby, indefinite in form and size, rose colored, 

 perforations numerous, relatively large, nearly circular, smooth ; medulla 

 composed of much-branched, intertwined filaments passing rather abrupt- 

 ly on either side into a few relatively large angular cells in turn merging 

 into short, 2-4 celled anticlinal rows, forming the cortex, the terminal 

 cells in the rows being 4-6 p. in diameter, and 2-3 times as long; repro- 

 duction unknown." 



Type: Holotype is Johnston 105, April 1921, on sheet 1347 in the 

 Herbarium of the California Academy of Sciences, San Francisco, Cali- 

 fornia. 



Type locality: Cast ashore, Isla San Pedro Martir, Gulf of 

 California, Mexico. 



Although no new material has come to light, a reexamination of the 

 type material has called for some comments. Transections of the type 

 show an exceedingly loose structure. The, "relatively large angular cells" 

 beneath the cortex are rather remote from each other or have prominent 

 interstices such as to form a very loose layer. The cortex is thin and 

 compact, but mostly of 1-2 cells ± anticlinally arranged. No instance 

 of 4 cells in a row was noted. Large stellate or arachnoid cells similar 

 to those found in Halymenia occur in the medulla. Since the structure is 

 in no way distinctive of Callymenia, this species may belong to any one 

 of several other genera. The plant must remain a species inqiiirenda. 



