54G TRANSACTIONS AND PROCEEDINGS OF THE [Sess. lvii. 



coast, growing on the rock in }»ools at about half-tide level, 

 in characteristic specimens from six to ten inches high, 

 with zijosporangia. 1 forwarded one of the specimens to 

 Professor Kjellman, of l^psala, and am indebted to him for 

 kindly identifying the plant. This is now first recorded as 

 a l>ritisli form. (See Illustration previous page.) 



Stictyosiplwn tort ills (Rupr.), like. — At Eoeberry Taing 

 in eonsidcraljle abundance in sandy pools at about half- 

 tide level. This species has only once before been found 

 in Orkney, namely, one specimen at Holm, East Mainland, 

 hy ]\Ir. J. W. Cursiter. 



CcdliUudnnioii (crlntscuhi (I)illw.), Lyugb. — In great 

 abundance, and of large size on flat rocks near low-water 

 mark, east of Harrabrough Head, at a place where there 

 is generally considerable surf. These are by far the finest 

 Orkney specimens I ])ave seen. 



Catcndla Opinitla (Good, and Wood.), Grev. — In dark 

 crevices near high- water mark, at the east of Harrabrough 

 Head, sometimes in very fine specimens. 



rjiodjjmcnid pnlmatfi (Linn.), Grev., forma sarnicnsis 

 (]\Iert.) Grev.; also var. V>. tciinissiiii((, Turn. — -In Kjellman 

 '■ Tlie Algae of the Arctic Sea, page 148. In Turn. Hist. 

 Fuc. 1, ])age 06. — This form and variety occur on the 

 sliores of St. Margaret's Hope, and at similar sheltered 

 places around the coast of the island, in large, Itushy tufts, 

 and sometimes in immense quantities. The typical form 

 seldom, if ever, accompanies them. The variety, W. 

 trnuissima, for the identification of which I am indebted 

 to I'rof. Kjellman, is now first recorded as haviug been 

 found iu ( )rk!iey. 



Coralliaa virditcrraiioi, Aresch. — At Kirkness in pools 

 at about half-tide level, rare. 1 aui indebted to Mr. 

 IJatters fnr kindly identifying the ])lant. It is now first 

 recorded as an Orkney s])ecies. 



CaUltluiiiLiiloii l)i/ssoi(/i's, Arn. — Fouiul many years ago 

 by Mr. Polle-xfen in Kirkwall Pay, epiphytic on Desniar- 

 t'dla ncuhatd. Determined by Harvey. 



rhijllopUovfi Brod'uc (Turn.), .1. Ag., forma d/igustissima, 

 C. Ag. — This form occurs in the Loch of Stenness. 



