174 Froceediiujs of the Royal Physical Society. 



more {G. W. T.); common and 

 fine in sliallow pools at Pres- 

 tonpans (G. W. T.) ; very fine 

 and abundant in sliallow pools, 

 from half tide to low water, at 

 Longniddry Point {G. W. T.); 

 pools " beyond Kincraig " 

 (M'Bain); pools at M'Duff's 

 Cave {G. W. T). 

 Bryopsis hyp7ioides, ... At Prestonpans, on the authority 



of the late Br Hassall, but the 

 species seems now to have dis- 

 appeared. Plants somewhat 

 resembling Bryopsis hypnoides 

 are found at Prestonpans, 

 Drummore, and Joppa, but 

 are referred by competent 

 authorities to delicate forms 

 of Bryop)sis plumosa (G. W. T., 

 1879). 



Order Ulvace.^. 



Porphyra laciniata, . . . Common, between tide marks. 

 „ vulgaris, . . . Common at many places, such 



as Joppa pools. 



Ulva latissima, .... Common. 

 „ lactuca, Elie; west of Kincraig, Earls- 

 ferry, where there is a fresh- 

 water stream (G. W. T) ; 

 sometimes at the fresh-water 

 stream at Joppa {G. W. T.) ; 

 at Longniddry {G. W. T) \ 

 at the three last localities at 

 half tide. 



„ linza, Pools at Caroline Park Eocks 



(Greville) ; fine at the Joppa 

 pools {G. W. T.) ; Elie {M'Bain), 

 at about half tide, 



PJnteromorpha compressa, . Common. 



