-n8 THE SCOTTISH NATURALIST 



specimen, but Mr J. W. Taylor on seeing it referred it to 

 L. glabra, but suggested that it might be well to see more 

 specimens. 



V.C. 89. Perthshire North. The species was found 

 in October 1870 by Dr F. Buchanan White in some small 

 pools on the Muir of Durdie. In this locality he stated that 

 almost every specimen had the three apical segments eroded, 

 and for this monstrosity proposed the name decollatum. 

 A few taken in this locality on the 12th November 1881 by 

 Messrs J. and H. Coates are now in the Museum at Perth, 

 and these we have seen. Since that date it does not appear 

 to have been taken in this locality. 



I am indebted to Mr H. Coates, F.R.S.E., the able 

 Curator of the Perth Museum, for notes on the locality. At 

 my instigation he visited the spot on the 20th November 

 1 91 7, half expecting to find the marshy pools where they 

 lived, and where Dr White and he had collected them, 

 either drained or dried up. He found plenty of water 

 in them but no trace of mollusca of any kind, possibly 

 by reason of the coldness of the season. The Muir of 

 Durdie is not named on the Ordnance Map, but is situate 

 3 miles E.N.E. of Perth Bridge, and about 500 yards E.S.E. 

 from the farm of Muirend. It is a stretch of high moorland 

 running across the top of the Sidlaw Hills, E.N.E. of 

 Kinnoull Hill. It stretches from the farm of Muirend 

 of Durdie on the west to the farm of Over Durdie on the 

 east, whence it derives its name. It is partly heather- 

 clad moorland, partly rocky, partly cultivated, and in 

 patches marshy. The general elevation is from 600 to 700 

 feet above sea-level, one pond being about 610 feet in 

 altitude. There are a few scrubby trees, oak, fir, etc., 

 scattered about. In the marshy pond, or ponds, where 

 L. glabra occurs (or occurred) there is an abundance of 

 vegetation, including rank grass, Sphagnum and other 

 mosses, the Common Rush {Juncus communis) and Potamo- 

 geton natans, besides other aquatic plants not easy to 

 determine when observed, not being in flower. 



From these notes on the various habitats it will be seen 

 that Limnaa glabra is in Scotland a shallow- water form, living 



