vol. i] Setchell— Gardner. — Alga of Northwestern America. 353 



North Pacific accessible to lis are all tetrasporic. Concerning 

 the synonymy and adoption of the name, we have followed the 

 general usage according to J. G. Agardh (1876, p. 257) even 

 after a careful consideration of the elaborate discussion of 

 Rnprecht (1851, pp. 295-308, under D. contorta) . Most of the 

 species placed under Dumontia by Postels and Ruprecht are to be 

 referred to Halosaccion or Gloiopeltis, while D. Glava and 

 D. coronata are, according to Ruprecht (1851, p. 286), of animal 

 rather than of plant nature, although the latter has been referred 

 to as possibly being a Ghcetangium . 



Cryptosiphonia Woodii J. Agardh. 



On rocks more or less exposed to the waves, in the lit oral 

 zone. West shore of Amaknak Island, Bay of Unalaska, Alaska, 

 ir.A.N. and A.A.L.. Xo. 3267! ; near Iliuliiik, Unalaska, Alaska, 

 W.A.S and A.A.L.. Nos. 4039!, 5010!: Sitka, Alaska, W.A.8. 

 and A.A.L., Xo. 5207! ; Vancouver Island, B. C, J. G. Agardh 

 (1870, p. 15, under Pikea Woodii); west coast of VVhidbey 

 Island. Wash.. A.L.G., Xo. 5! 



It seems that the more densely branched, bushy species which 

 does not collapse when removed from the water, is Cryptosi- 

 phonia Woodii and not the slender plant which collapses. The 

 latter has passed among California^ algologists under this name, 

 however, and has been distributed by one of us (in Collins, Holden 

 and Setchell, P. B.-A.. No. 149! ) under it, but is really to be 

 placed under the next species. It may be doubted whether the 

 two species (as now recognized) represent more than divergent 

 forms of one rather varied species! 



Cryptosiphonia Grayana J. Agardh. 



On rocks in the literal zone. Harvester Island, Uyak Bay, 

 Kadiak Island. Alaska, W.A.S. and A.A.L., No. 5126! ; Kukak 

 Bay, Alaska, Saunders (1901, p. 441); Orca, Alaska, W.A.S. 

 and A.A.L.. Xo. 5160!; Yakutat Bay, Sitka, and Wrangell, 

 Alaska. Saunders (1901, p. 441); Vancouver Island, B. C, 

 J. G. Agardh (1870, p. 15, under Pikea Grayana) ; west coast of 

 WMdbey Island, Wash., W.L.G., Xo. 5a! 



