Vol.1] iSeirlieU-Gardner. — Alqic of Xorilt tee stern America. 805 



Ahnfeldtia plicata (Hudson) Fries. 



On rocks in the lower literal and uj^per sublitoral zones. 

 Arctic coast of Alaska, Harvey {1ST2, ]). 463); St. Lawrence 

 Island and Port Clarence, Alaska, Kjellniaii (1889, p. 30); St. 

 Michael, Alaska, Herb. J>. C. Eaton, No. IG! ; St. Paul Island, 

 Alaska, RnprecJif (1851, p. 326, under Gynmogongnis fastigiatn.s 

 f. crassiorD ; Unalaska, Alaska, Bnprecht (1851, pp. 251 and 

 327, under Gijmnogoi^grns fastigiafus) ; Kadiak Island, Alaska, 

 Bnprecht (1851. ]). 326, under Gymnogongrna fastigiatus f. 

 crassior) ; Prince William Sound and Yakutat Bay, Alaska, 

 Saidittfrs (11)01. ]). 435); Sitka, Alaska, Postels and Ruprecht 

 (1840. p. 16. under Gigartina fastiqiata) ; North Pacific Ocean, 

 Posteh and Ruprecht (1840, ]). 16, under Gigartina plicata) \ 

 Es(|uinialt and Fuca Strait, Harrci/ (1862, p. 171) ; Port Renfrew, 

 B.C., Bathrand PoJhij, No. 8 (in part) ; Whidbey Island, X.L.G., 

 No. 30! 



While it seems certain that this species is distributed along 

 the whole coast of North America, so far as our own ex]3erience 

 is concerned, it seems to be scarce. 



We do not know what to do with Ruprecht's species Gymnogon- 

 i/nis fastigiatiis and its f . crassior, but refer it here with a feeling 

 that perhaps some of it may Itelong with the next. Schmitz 

 (1893, ]). 394) seems inclined to reckon the Ruprecht plant as a 

 variety, at least, of A. plicata. 



Ahnfeldtia concinna J. Agardh. 



Port Renfrew, B. C, Butler and Polley, No. 27; west coast 

 of Whidbey Island, Wash., X.L.G., No. 35! 



A coarser species and, in No. 35. }>rovided with cystocarps. 

 We have united under this name the .4. concinna and tlu^ .4. 

 (ligtniinnides of .1. ({. Agardh. 



Sterrocolax crassior Schmitz. 



On Ahnfeldtia plicata, apparently parasitic. St. Michatl. 

 Alaska, Herl». />. C. Eaton, No. 16! ; Unalaska, Alaska, Rnpnchf 

 (1851, ]). 327, as nemathe(da of Gymnogongrns fastigiatiis f. 

 crassior), Schmitz (1877, p. 394): Kadiak Island, Alaska, 

 Ruprecht (1851, ]). 327, as in Unalaska specimen) ; Port Renfrew, 

 B. C, liatlcr and Polley, No. 81 (in inirt). 



