The Scottish Naturalist. 209 



Drdsscna polymorpJia Pallas. — Local, in canals, &c. In the 

 Forth and Clyde canal at Edinburgh and Glasgow. 



Anodonta cygnea L. — In ponds, canals, and slow streams. 

 Local. The only form I have seen in Perthshire is the van 

 i/icrassata, which is found in the Earn. 



A. anatina L. 



Unto margaritifcr L. — Common in almost all the rivers. The 

 vars. sinuata and Roissyi occur in Perthshire and elsewhere. 

 This species must be considerably rarer than it was a few years 

 ago, from the immense numbers destroyed by the pearl fishers. 



Pisidium amnicum Mull. — In lakes and slow streams. Widely 

 distributed. 



P. pusilhun Gmel. — Said to occur throughout. Often among 

 wet moss. 



P. uitidum Jen. — In ponds, &c. Throughout, but local. The 

 var. splendens occurs at Lerwick and in West Ross (B. C. I. 25). 



P. casertanum Poli. — In ponds and streams. Said to occur- 

 throughout. Near Glasgow (Haddin /. c. s.) 



P. fontinale Drap. — A common and widely-distributed species 

 in ditches, shallow pools, <Sic. Many species have been made 

 out of the varieties of this. 



Spharium corneum L. — A common and widely-distributed spe- 

 cies in ponds and slow streams. The var. flavescens is recorded 

 by Jeffreys from Aberdeenshire and Lerwick. I have found it in 

 several mountain lochs in Inverness-shire, Kirkcudbrightshire, &c. 



S. lacustris Mull. — In lakes and marshes. Near Glasgow 

 (Purdie). 



j t> v 



The Squirrel in Scotland.— Since from time to time notes on the dis- 

 tribution in Scotland of the Squirrel have appeared in our columns, the 

 following extract from Pennant's "Sketch of Caledonian Zoology" in 

 Lightfoot's "Flora Scotica" (written more than one hundred years ago) may 

 be of interest to our readers: — "Scarce in Scotland; a few in the woods 

 of Strathspey." 



Of the Wild Cat Pennant says, "abounds in all parts of the highlands;" 

 of the Pine-martine, "is found in the pine-forests, and takes possession of 

 the holes made by the woodpeckers"; of the Black Rat, "swarms in 

 Caithness and Ross-shire"; and of the Brown Rat, "introduced here within 

 these 60 years"; of the Common Urchin, or Hedgehog, "not found beyond 

 the Tay : perhaps not beyond the Forth" (!) ; of the Black Eagle, or Ring- 

 tail Eagle (I suppose the Golden Eagle is meant), "in Rannoch, eagles 

 were, a few years ago, so very numerous, that the commissioners of the 

 forfeited estates offered a reward of five shillings for every one that was de- 

 stroyed : in a little time such numbers were brought in, that the Honour- 

 able Board reduced the premium to three shillings and sixpence." 



