Box.— Vol. II.] HUS—PORPHYRA. I99 



Distribution. — P. laciniata appears to be limited on the 

 Pacific Coast to the shores of Alaska (6i°-54° N. lat.). 



Localities. — Orca, Alaska (W. A. Setchell, No. 5164!); 

 Yakutat, Alaska (Rev. Albin Johnson, No. 14!); Uyak 

 Bay, Kadiak Island, Alaska (W. A. Setchell, No. 5099!); 

 Sitka, Alaska (de A. Saunders, No. 136!); Annette Island, 

 Alaska (de A. Saunders, No. 26!); Amaknak Island, 

 Alaska (W. A. Setchell, No. 3269!, No. 3270!). 



2. Porphyra laciniata f. umbilicalis Ag. 



Icones Algarum, Tab. XXVI, 1S2S. 



Porphyra laciniata f. umbilicalis C. A. Agardh, Icones Algarum, Tab. 

 26, 1828. Setchell, Algae of the Pribilof Islands. Fur and Fur-seal 

 Islands of the North Pacific Ocean, 1899, p. 593. Hus, Zoe, Vol. V, 

 1900, p. 62. 



Distribution. — Pribilof Islands, Bering Sea; U. S. S. 

 Albatross (according to Setchell, 1899) (57° N. lat.). 



3. Porphyra leucosticta Thur. 



Plate XX, Figs. la-T^b. 

 In le Jolis, Liste des Algues Marines de Cherbourg, 1864, p. 100. 



Porphyra leucosticta Thuret in le Jolis, Liste des Algues Marines de 

 Cherbourg, 1864, p. 100. de Janczewski, Etudes Anat. sur les Por- 

 phyra, 1873, p. 241. Collins, Bull. Torrey Bot. Club, Vol. XI, 1884, 

 p. 131. Farlow, Marine Algae of New England, 1881, p. 112. Holden, 

 in Collins, Holden & Setchell, Phyc. Bor.-Amer., Fascl. VIII, 1897, 

 No. 376. Hauck, in Hauck & Richter, Phyc. Universalis, Fascl. IX, 

 1891, No. 401. Hus, Zoe, Vol. V, 1900, p. 63. 



Porphyra atropurpurea de Toni, Syll. Alg., Vol. IV, 1897, p. 17. 



Membranous, 7-70 cm. long, 2-25 cm. broad, oblong with slightly undulate 

 margin; base cordate, stipitate; color light pink; monostromatic, vegetative 

 part of frond 25-50/x thick, cells once and a half to twice as high as broad, 

 surface jelly thin; fronds monoecious, antheridia forming small, elongated, 

 colorless patches among the dark-colored sporocarps; fruit marginal, gradu- 

 ally spreading over the whole frond, no vegetative cells intermixed with the 

 reproductive cells, sporocarpic part of frond 25-50// thick, eight carpospores 

 in each sporocarp; antheridial part of frond 30-50/^ thick, 64 antherozoids in 

 each antheridium. 



Porfhyra leucosticta Thuret is an annual, only to be 

 found in the spring months. It has never, to the writer's 



