BoT.— Vol. II.] HUS—PORPHYRA. I93 



America P. laciniata has been reported from Orca, Alaska, 

 from Yakutat, and from Amaknak Island (between 61° and 

 54° N. lat. ). P. laciniata f. umhilicalis was reported by 

 Professor Setchell (1899) f^'oin the Pribilof Islands. 



Porphyra hitcosticta Thur. does not appear to possess 

 such a wide range as the species just discussed. It is found 

 on the Atlantic coast of England, Germany, and France, 

 and appears to be abundant in the Mediterranean. Collins 

 (1884) and Holden (1897) have detected it on the eastern 

 shores of North America, and while it may have a wide 

 distribution on the Pacific Coast, it has as yet been reported 

 from but a single locality, Monterey Bay, California (36° 45' 

 N. lat.). 



Up to the present time the members of the ^^miniata" 

 group, under which the author includes P. amplissima , P. 

 miniata, P. tcmcissima, and P. abyssicola, have been reported 

 by European collectors only from the more northern latitudes 

 (6o°-8o° N. lat.). On the west coast of North America 

 these species have not been reported from so far north, 

 ranging between 36^ 45' and 60° N. lat. 



P. amplissima was first found by Kjellman (1883) in the 

 Norwegian Polar Sea, and it has since been reported from 

 both the east and west coast of Greenland. Kjellman did 

 not detect this species in any of the localities visited by the 

 Vega Expedition. Since then it has been collected at Orca, 

 Alaska (60° 30' N. lat.), and near Coupeville, Washington 

 (48° 10' N. lat.). 



P. tenuissima occurs on the shores of Norway, Iceland, 

 and Greenland. It has never been found in the Bering 

 Sea, but it has been collected at Sitka, Alaska (57° N. lat.). 



P. miniata is met with on the coasts of Norway, and 

 attains its greatest latitude on the northwest coast of Spitz- 

 bergen (79° 49' N. lat.). It is also found on the east coast 

 of Norway and in Baffin Bay, whence it descends to New 

 Foundland. 



There exists some doubt in the author's mind as to the 

 occurrence of the typical P. miniata on the Pacific Coast. 

 Only an extensive collection of specimens gathered on 



