64 , West-Coast Porphyras. [zor 
Distribution. This species appears to be confined to the Pacific 
Coast, where it occurs from Alaska to Southern California (61°— 
32°20’ N. lat.). 
Localities. Orca, Alaska, W. A. Setchell No. 5159!; Glacier 
Bay, Alaska, de A. Saunders No. roo/; Baranof Isl., Alaska, de 
A. Saunders No. 130!; Shumagin Isl., Alaska, de A. Saunders 
No. 394/; Chehalis Bay, Wash., Ralph Emerson, No. 1792/,; Cres- 
cent City, del Norte Co., Calif., WH. Aus’; Trinidad, Humboldt 
Co., Calif.; A. Hus/; Duxbury Reef, Marin Co., Calif., W. A. 
Setchell No. 1055! H. Hus/; Farallone Isl., Calif., H. Hus/; Land’s 
End, San Francisco, Calif., W. A. Setchell No. 2034! HT. Hus!; 
Monterey, Calif., W. A. Setchell! H. Hus!; San Simeon Bay, 
Calif., Dr. Palmer!/; Port Harford, Calif., W. A. Setchell No. 
7139/; Santa Barbara, Calif., Mrs. Cooper!; San Diego, Calif., 
Miss Reed! 
PORPHYRA PERFORATA F. SEGREGATA Setchell et Hus MS. 
Membranous, 2-20 cm. long, 1-8 cm. broad; oblong lanceolate 
with undulate margin, often much expanded and laciniate; base 
more or less umbilicate; attached by a disc; gray to brown-purple, 
becoming blue-purple on drying; monostromatic; vegetative 
part of frond 607 thick; cells square or slightly higher than 
‘broad; surface jelly thick, often forming one-half the thickness 
of the frond; moncecious; sporocarps and antheridia in irregular 
patches, radiating towards the margin of the frond; vegetative 
cells often mixed in with the sporocarps, never with the anther- 
idia; each sporocarp containing 32 carpospores, each antheridium _ 
containing128 antherozoids; both carpospores and antherozoids 
divided into distinct groups by thick jelly-walls. 
This plant agrees in many respects with the species, but the 
smaller size of the fronds, their lesser thickness, the form of the 
base, and especially the greater thickness of the jelly-walls 
entitle it to a separate place. 
The great thickness of the jelly-walls may be seen advanta- 
geously in a surface view of the vegetative portion of the frond, but 
an best be seen in a cross section of the reproductive cells, being 
especially noticeable in case of the antheridia. The wall laid 
down by the first reproductive division of the antheridium is very 
