So The Diatoms of LinlitJigow Loch. [Sess. 



Stellaria glauca With. 



This very rare plant in the Edinburgh district was gathered 

 abundantly at Pliilpstoun Loch on 3d July 1886. 



Pyrus Aria L. Arthur's Seat. 



Chrysosplenium alternifolium L. Auchendinny and Roslin. 



C. oppositifolium L. Auchendinny and Eoslin. 



Parnassia palustris L. Pentlands near Clubbiedean, 



Adoxa Moschatellina L. Firth Woods, Eoslin. 



Senecio aquaticus Huds. Duddingston. 



Vinca minor L. Roslin ; naturalised. 



Littorella lacustris L. Philpstoun Loch. 



Veronica montana L. Firth Woods. 



V. scutellata L. Philpstoun Loch. 



Bartsia Odontites Huds. Pentlands between Clubbiedean and 

 Carrie, and in the neighbourhood of Balerno. 



Alisma Plantago L. Philpstoun Loch. 



Butomus umbellatus L. Duddingston Loch ; introduced. 



Sparganium ramosum Huds. Duddingston Loch. 



Typha latifolia L. Duddingston Loch. 



Asplenium septentrionale Hull. Arthur's Seat. 



Polypodium Phegopteris L. Tynehead, Habbie's Howe, Auch- 

 endinny. 



P. Dryopteris L. Tynehead, Auchendinny. 



XNll.—THE DIATOMS OF LINLITHGOW LOCH. 

 By Mr JOHN LINDSAY. 



{Read May 25, 1887.) 



At the Society's excursion to Linlithgow on the 30th ult., it 

 occurred to some of the members of the Biological Section 

 that a few samples of water from the loch might be taken, to 

 be afterwards examined under the microscope. It was be- 

 lieved that a number of very interesting forms of " low life " 

 were present in this loch : indeed, a few years ago Mr Pearcey, 

 of the Challenger Commission, made an investigation on this 



