I, 8 mB 
VOL. V. SEPTEMBER-OCTOBER, 1g00. No. 4-5 
PRELIMINARY NOTES ON WEST-COAST POR- 
i PHYRAS.* 
Mts UR AUS 
Up toa few years ago our knowledge of the members of the 
genus Porphyra occurring on the West Coast of North America, 
was exceedingly meager. But few efforts had been made to dis- 
tinguish between the various species, the names ?. vulgaris or 
P. laciniata, being applied to them all. 
J. G. Agardh (’82) reported P. perforata and P. coccinea (P. 
naiadum ?) from the Pacific Coast. In 1891 Dr. Anderson added 
two new species, P. naiadum and P. Nereocystis, while Tilden 
('98) credited four species of Porphyra to the Pacific Coast, viz., 
P. miniata, P. naiadum, P. leucosticta, and P. laciniata. 
Some of the species above mentioned, proved, on examination, 
to be identical with others, so that, up to 1899, there had been 
reported from the West Coast of North America but four species, 
viz., P. perforata, P. naiadum, P. Nereocystis, and. P. miniata. 
To this number we have added nine species or varieties, among 
which there are four new ones. 
This notice is intended merely as a preliminary, awaiting the 
publication of the author’s carefully prepared notes and drawings. 
KEY. 
© sitgle gona cm dg-epssiptemmaaions Lae EOE gt le ae ean 2 
«Sige able sees earn Ce OE ET EU ERE OE eee 7 
Fronds monostromatic or distromatic ..........:.c:ccssssesesssseseee soceee css. II 
2. Base cushion-shaped, consisting of parenchymatous cells.....P. naiadum. 
SE A ee Eee eC he 
*Contributions from the Botanical Laboratories of the University of California. No. 12. 
