46 ANNALS OF SCOTTISH NATURAL HISTORY 



48. C. didymochondrum, Nordst. and Wittr. Very rare. Ross- 

 near Tain ; Inverness Glen Urquhart. 



DESCRIPTION OF SCOTTISH DESMIDIE/E, PLATE II. Fig. i. Cosmarium 

 plicatuvi, Reinsch, x 400. Fig 2. C. plicatiini, Reinsch, var. Scoticiun, Roy and 

 Bisset, x 400. Fig. 3. G. nephroideum (Witt.), R. and B. : a, front; b, side; c, 

 end ; x 600. Fig. 4. C. Garrolense, R. and B. : a, front ; b, side ; c, end ; 



x 600. Fig. 5. C. elegans, R. and B., x 400. Fig. 6. C. Corriense, Bisset: 

 a, front ; l>, side ; c, end ; x 400. Fig. 7. Cosinocladiiini constrictum, Archer : 

 a, front ; /;, end ; c, zygospore ; x 600. Fig. 8. Cosmaritiin granu/itsculiim, R. 

 and B. : a, front ; b, side ; c, end ; x 400. Fig. 9. C. cyclicitm, Lund., *arcticnm, 

 Nord., x 400. Fig. 10. C. latni/i, Breb., x 400. Fig. II. C. latiini, Breb., var. 

 minor, R. and B., x 400. Fig. 12. C. margaritatiim (Lund.), R. and B., 



x 400. Fig. 13. C. odontopleumm, Archer : a, front ; />, zygospore ; x 600. 

 Fig. 14. Cosmocladium pcrissum, R. and B. : a, front ; ^,'side ; c, end ; d, zygo- 

 spores ; x 600. Fig. 15. C. Logiense, Bisset, x 400. Fig. 16. C. Siinii, R. and 

 B., x 400. Fig. 17. C. flavuin, R. and B. : a, front ; l>, zygospore ; x 400. Fig. 

 18. C. Corbula (Breb.), Archer: a, front; b, end; x 600: <-, zygospore; x 400. 

 Fig. 19. C. Slewdrumense, Roy : a, front ; b, zygospore ; x 600. Fig. 20. Arthro- 

 dcsimts octocornis, Ehrb., jl major, Ralfs : zygospore, x 400. 



ARCTIC PLANTS IN THE OLD LAKE DEPOSITS 



OF SCOTLAND. 



By JAMES BENNIE 

 (H.M. Geological Survey of Scotland). 



IN a report of the Royal Society's Soiree, published in 

 "Nature" (i4th May 1891), Arctic plants from Hailes, near 

 Edinburgh, were noticed as exhibited by the Director-General 

 of the Geological Survey ; and a list of species was given 

 by Mr. Clement Reid. At the meeting of the British 

 Association in 1892 a paper " On Fossil Arctic Plants found 

 near Edinburgh " was read by Mr. Reid ; and an abstract 

 was published in the Report for that year, page 716. 

 Besides Hailes, it included Corstorphine, and the list 

 enumerates the plants found at both places. A list of 

 mosses is also given. As the abstract is short, it may be 

 quoted in full as the best introduction to those who are as 

 yet unacquainted with the facts it proves, and as being also 

 the best means to enforce the lesson or moral to which we 

 wish to draw the attention of Scottish Naturalists, namely 

 the probability that at the bottom of almost all our lake 

 deposits Arctic plants may be found. Much knowledge of 

 the climate to which they testify may be learned from similar 

 deposits in other places besides those near Edinburgh. 



