148 Natiiral History of the Farallones. [zoe 



Lichens — 



Determined by Mr. M. A. Howe, of the University of California. 

 Theloschistes lychnens (Nyl.) Tuck. var. pygmaciis Fr. On high 

 rocks. 



Theloschistes ? Similar situations. 



Buellia petraea (Flat., Koerb.) Tuck.? On rocks. 

 Placodium (not fruited). On rocks. 



Alg^ — 



Determined by Dr. C. L. Anderson (Diatomaceae omitted). 



Bryopsis plumosa Lmx. 



Codiiim tomentosian Slack. 



Monostroma qitarternai'iwn Desm. 



Ulva latissima L. 



Enieromorpha compressa Lejolis. 



E. clathrata Ag. 

 CladopJiora scoptsfornis Rupr. 

 C. iincialis Fl. Dan. 



C. cartilaginea Rupr. 

 C. glomerata Ag. 

 Desmarestia lignlata Lmx. 

 LeatJiesia tuberiforniis Gray. 

 Chordaria abietina Rupr. 

 Asperococcus sinuos2is Bory. 

 Egregia Menziesii (Ag.) Aresch. 

 Lanmtaria Andersonii Farlow. 

 Alaria Jistidosa Post. & Rupr. 

 PtergopJiora Califoryiica Rupr. 

 Macrocystis pyrifera Ag. 

 Nereocystis Ltttkenana Rupr. 

 Fuciis vesicculosus L. 



F. fastigiatus Ag. 

 Halidrys osmiindacea Harv. 

 Porpliyra laciniata=^P. vulgaris Ag. 



PoRPHYRA Naiadum Anderson, n. sp. — Fronds small, seldom 

 more than 2 inches long and Y2 inch wide, very thin, spatulate with 

 short stipes, tapering quickly into a flat membrane, with slightly 

 wavy entire margin; dark purple or maroon; cells small, structure 

 fragile and rapidly decaying. 



