302 University of California Publications. [botany 



Gigartina mamillosa f. cristata subf . prolifera Setchell and 

 Gardner subf. nov. 



On rocks in the literal zone. Orca, Alaska, W.A.8. and 

 A.A.L., No. 5167! ; Yakutat Bay, Alaska, Rev. Albin Johnson, 

 No. 5707!; Traeyton, Kitsap County, Wash., Tilden, No. 220!, 

 under G. mamillosa. 



This differs from the preceding by the papilla? being produced 

 into lanceolate blades. It is merely a sterile foliiferous state of 

 the preceding, but is of common occurrence on the coast of 

 California in waters containing a considerable admixture of fresh 

 water. 



Gigartina mamillosa f. dissecta Setchell comb. nov. 



Esquimalt, B. C, Harvey (1862, p. 172, under G.mamillaris 

 f . vulgaris) . 



This seems to be the same as G. papillata f. dissecta Setchell. 



Gigartina mamillosa f. subsimplex Setchell comb. nov. 



On rocks in the upper literal zone. Captains Bay, Unalaska, 

 Alaska, W.A.S. and A.A.L., No. 5013!; Shumagin Islands, 

 Alaska, Saunders (1901, p. 434, under G. papillata f. typica); 

 Harvester Island, Uyak Bay, Kadiak Island, Alaska, W.A.8., and 

 A.A.L., No. 5114!; Sitka, Alaska, Buprecht (1851, p. 318, 

 under Chondrus mamillosus var. Sitchensis) . 



This is the type of C. A. Agardh's G. papillata, the type speci- 

 men of which was collected by Chamisso. Chamisso labelled the 

 plant as coming from Oahu, one of the Hawaiian Islands, but as 

 Ruprecht (1851, p. 318) remarks, it probably came from 

 Unalaska. It is G. papillata f. subsimplex Setchell. 



Gigartina radula f. typica Setchell. 



On rocks lower literal and upper sublitoral zones. Puget 

 Sound, Bailey and Harvey (1862, p. 162); Strait of Juan de 

 Fuca and Victoria, B. C, Harvey (1862, p. 172); Port Renfrew, 

 B. C, Butler and Polley, No. 73; west coast of Whidbey Island, 

 Wash., N.L.G., No. 175! 



With the exeeptiou of Gardner's specimen, we assume that 

 the references quoted belong to the typical form of this species. 

 Gardner's specimen is nearthe type, but not exactly corresponding. 



