242 Note on the Algce of the Elf Loch. [Sess. 



IX.— NOTE ON THE ALGJH OF THE ELF LOCH. 

 By Mr F. L. M'KEEVER, F.R.M.S. 



{Read April 27, 1910.) 



Two papers on " The Upper Elf Loch, Braids," by Dr Thomas 

 Scott, r.L.S., and Mr John Lindsay, were read to the Society 

 in April 1897 and March 1898, and are now printed in 

 vol. iii. of the ' Transactions.' In the second paper a list 

 of the Algae found in the Elf Loch is given (p. 381). During 

 the visits I was able to pay to this interesting sheet of water 

 in 1909, I collected the following species of Algae which are 

 not contained in the above-mentioned list — viz. : 



Class— CHLOROPHYCEJE. 

 Family — Chsetophoraceae. 



1. Ghceto'phora elegans (Roth) Ag. 



2. (t pisiformis (Roth) Ag. 



3. Myxonema tenue (Ag.) Rabenh. 



4 Draparnaldia plumosa ( Vauch. ) Ag. 



Family — Protocoecaceae. 



5. Ankistrodesmus falcatus (Corda) Ralfs. 



Family — Palmellaceae. 



6. Tetraspora gelatinosa (Vauch.) Desv. 



Class— HETEROKONT^. 



Family — Chlorotheciacese. 



7. Characiopsis turgida W. & G. S. West. 



In the same paper (pp. 382, 383) a very complete list of 

 the Eotifera is given, containing no less than ninety-seven 

 species. In May 1909, while looking for Algae, I found 

 several specimens of a beautiful colonial Rotifer, Conochilus 

 volvox Ehrenberg. This Rotifer seems to be by no means 

 rare in the plankton of our lakes, but has, as far as I am 

 aware, not yet been recorded from the Upper Elf Loch. 



