126 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 17 



dissected-flabellate shape; tetrasporangial conceptacles mostly congested 

 in lower branches, arising irregularly from all parts of intergenicula 

 and often the first formed ones giving rise to secondary conceptacles 

 from their upper sides. 



Type: Holotype is Dawson 557, Feb. 13, 1946, on sheet 4275 and 

 in box 55047 in HAHF. 



Type locality: Rocky shore at Punta Colorado, near Guaymas, 

 Sonora, Mexico. 



Additional material: The following collections include fertile 

 material and can definitely be placed here. D. 488, Bahia Bocochibampo, 

 Sonora, Feb.; D. 123-40, Isla Turner, Sonora, Jan.; D. 394-40, Bahia 

 Tepoca, Sonora, Feb. In addition, 15 collections of sterile specimens 

 have been examined and are probably referable here. They are from 

 the region north of Guaymas in the Gulf with the exception of a col- 

 lection from Bahia Agua Verde, Baja California. 



Portions of a collection from Punta Santa Rosalia on the Pacific 

 Coast of Baja California have markedly digitate terminal intergenicula 

 and are quite like the Gulf specimens. 



Whereas the variety which includes the type occurs along the entire 

 length of Pacific Baja California, this flabellate-digitate plant, which 

 because of several intermediate forms seems inseparable as a distinct 

 species, occurs widely in the Gulf of California. When fertile these 

 plants are readily distinguished from the several other CoraUina species 

 by the irregular development of conceptacles from the faces and margins 

 of the intergenicula as well as from the apices. The congested and prolif- 

 erous nature of these conceptacles in var. digitatus is particularly distinc- 

 tive, as is also the varied and elaborate shapes of some of the intergeni- 

 cula. 



Corallina vancouveriensis Yendo 



Plate 28, fig. 2 



Yendo, 1902, p. 719, pi. 54, fig. 3, pi. 55, figs. 1-2, pi. 56, figs. 16- 

 17; Taylor, 1945, p. 201. Corallina aculeata Yendo, 1902, p. 720, pi. 

 55, fig. 3, pi. 56, figs. 18-19. Corallina officinalis f. aculeata (Yendo) 

 Setchell & Gardner, 1903, p. 367. CoraUina officinalis f. multiramosa 

 Setchell & Gardner, 1903, p. 366. Corallina gracilis f. densa Collins, in 

 Collins, Holden & Setchell, Phyc. Bor. Amer. no. 650; Collins, 1906, p. 

 112; Smith, 1944, p. 230, pi. 50, figs. 3-5; Dawson 1945b, p. 60, 65. 

 Corallina densa (Collins) Doty, 1947, p. 167. Corallina gracilis var. 

 lycopodioides Taylor, 1945, p. 200, pi. 63. 



