68 West-Coast Porphyras. [ ZOE 
No. 5165/; de A. Saunders No. 259a!; Unga, Alaska, W. A. 
Setchell and A. A. Lawson No. 5047/; Amaknak Isl., Alaska; 
W. A. Setchell No. 3268!; Coupeville, Washington, NV. LZ. Gard- 
ner No. 47/ 
PORPHYRA MINIATA F. CUNEIFORMIS Setchell et Hus MS. 
Fronds membranous, 15-50 cm. long, 4-15 cm. broad, lanceo- 
late with undulate, crenulate margins; red-purple; dase strongly 
cuneate, attached by a disc; fronds distromatic, often monostro- 
matic near the edges in the vegetative part; 30-75» thick; cells 
square or twice as long as broad; surface jelly ro-12.5 thick; 
fronds monecious, antheridia and sporocarps intermixed in mar- 
ginal zone, gradually spreading over the whole frond:—each 
sporocarp containing 4 carpospores and each antheridium con- 
sisting of 8 antherozoids. 
Habitat. Found floating. 
Distribution. From Alaska southward to Middle California 
(60°-36° 45’ N. lat.). 
Localities. Gulf of Alaska, de A. Saunders No. 20/; Coupe- 
ville, Washington, V. LZ. Gardner/; Monterey Bay, Calif., A/rs. 
J. M, Weeks! 
PORPHYRA TENUISSIMA (Strémf.) Setchell et Hus MS. 
Diploderma tenuissimum. (Stromf.) Bot. Centrallblatt, Vol. 26, 
P- 73- 
This species may be readily distinguished from other distro- 
matic species by its great thinness, which varies between 2 5-307 in 
the upper part of the frond, while at the base the thickness is 
constantly 75. Each sporocarp contains 4 Carpospores and each 
antheridium 8 antherozoids. 
Habitat. Epiphytic on algze; also on rocks Ct). 
Distribution. As yet known on the West Coast of North 
America only from Alaska (57° N, lat.). 
Locality. Sitka, Alaska, de A. Saunders No. r48a! 
PORPHYRA ABYSSICOLA Kjellm. Algz of the Arctic Sea, p. 
I9I, 1883. 
P. abyssicola may be distinguished from P. tenutssima by the 
