﻿President's Address. 



11 



this latter point, however, further investigations ought to 

 be made. Other ponds and pools, besides those at Braid 

 Hills, from which I have myself examined " dips," and found 

 to be rich in similar microscopic life, are the old marl-pit 

 at Davidson's Mains, a pond at Duntarvie near Winch- 

 burgh, and a pool on Dumbarnie Links near Largo. I do 

 not presume, however, to record the forms observed. To be 

 of any value, the records must come from persons possessing 

 special knowledge of the groups. Strethill Wright, it may 

 be mentioned, described a Ciliate, Stentor castaneus, Wr., 

 from the pond at the Edinburgh Botanic Garden,^ whence 

 also Ophrydium versatile, Ehr., has been recorded by W. E. 

 M'Nab.2 



Struck with the results obtained by Penard from sphagnum, 

 etc., in Switzerland, I have been endeavouring, during the 

 past year, to find out what Sarcodina belonging to the groups 

 Ehizopoda (s. sir.) and Heliozoa are present in our moor-pools. 

 With this object I sought the assistance of Mr James Cash, 

 author of the Kay Society's recent volume on British Fresh- 

 Water Bhizopods, and of Mr J ames Murray, of the Scottish 

 Lake Survey, to both of whom my best thanks are due 

 for supplying me with lists of the species found in material 

 which I sent them from time to time. Dr Penard, of Geneva, 

 has also kindly favoured me with a report on a parcel of 

 bog-moss sent to him. Samples of sphagnum and other wet 

 moss from sea-level to mountain-top have in this way been 

 examined, and a list of over 60 Ehizopoda and 4 Heliozoa 

 obtained. The small yield of Heliozoa is rather surprising, 

 I have tabulated Mr Cash's reports for the different localities, 

 and they seem in harmony with the view that these 

 organisms are little aflected by altitude, so long as their 

 immediate environment is suitable. The species reported 

 by Penard and Murray are also shown in the Table. Cash 

 regards a Nebela detected by him as an undescribed species, 

 while Zonomyia violacea, NtLssL, Nelela tenella, Pen., and 

 Placocysta jitrassica, Pen., are additions to the British list. 



1 Proc. Boy. Phys. Soc. Edin., vol. ii. p. 33. 



2J&.,vol. iii. p. 46. In vol. iii. (p. 233) Dr Stevenson Macadam 

 mentions 5 Ciliates (generic names only) and 1 Flagellate {Euglena viridis) 

 from the Water of Leith. 



