NO. 1 TAYLOR: PACIFIC MARINE ALGAE 113 



but even in the largest "sporangia" only one egg appeared. In the spo- 

 rangia of intermediate age tTiere were a lighter spot in the middle and 

 darker ones toward the ends, but at no stage was any cleavage present. 

 In young stages of growth of the plant there was a slight bilaterality of 

 the branching from the axis not evident in older plants. One notes that 

 Blossevillea Brandegeei Setch. & Gard. (1913, p. 325, pi. 46), though 

 with a very different mature main axis, looks a little like these plants in 

 its fractiferous parts and has but one egg in each sporangium. The writer 

 is inclined to consider this plant more nearly related to B. Brandegeei 

 than to B if ur carta Stackhouse {Fucodium J. Agardh) with single eggs, 

 or to Pelvetia Decaisne & Thuret with two, where it was put by De Toni. 

 Ecuador: Archipielago de Colon, I. Isabela, Hassler Exped. no. 

 1019, June 1872. Ibid., I. Rabida, Hassler Exped. no. 1013, June 1876. 

 Ibid., dredged from 37 meters opposite Gordon Rocks, I. Santa Cruz, 

 Schmitt no. 316A-35, 8 Dec. 1934. Ibid., on rocks in the littoral in 

 front of the settlement at Academy Bay, no. 34-302, 20 Jan. 1934. Ibid., 

 dredged east of Wreck Bay in 3.6-5.4 meters, I. San Cristobal, Schmitt 

 no. 41 A -33, 30 Jan. 1933. Ibid., from the shore rocks southeast of 

 Cormorant Rock, I. Santa Maria, Schmitt no. 38A-33, 29 Jan. 1933. 

 Ibid., abundant on the higher littoral rocks at Black Beach Anchorage, 

 no. 34-208, 17 Jan. 1934. 



CYSTOSEIRA C. Agardh, 1820 



Plants erect and bushy from a fibrous holdfast, the main stalks angu- 

 lar with a few main branches which become flattened and pinnately 

 divided, filicoid, and in their upper segments bearing in the ends of the 

 branches receptacles and in branchlets of lower orders, seriate vesicles. 



Gystoseira osmundacea (Menzies) C. Agardh 



Setchell & Gardner 1925, p. 709; Smith 1944, p. 156, pi. 34. 



Mexico : Baja California, on littoral rocks at Ba. Thurloe, Pta. San 

 Bartolome, no. 34-619, 9 Mar. 1934. Ibid., dredged from 14-18 meters 

 off Ba. Thurloe, Schmitt no. 283C-34, 9 Mar. 1934. 



HALIDRYS Lyngbye, 1819 



Plant bushy, arising from a holdfast, the erect stipe cylindrical or a 

 little flattened, branching alternately, the branches subsimple to pinnate, 

 below bearing alternate, linear to spatulate, simple to sparingly pinnate 

 foliar divisions, near the tips filiform divisions developing flattened, 

 chambered vesicles, and at the ends developing filiform receptacles. 



