200 



The fungi were kept by Frost in paper boxes or glued flat to 

 sheets of blank books. It is said that these were considerably 

 disturbed soon after his death by visiting botanists. A number 

 of the fleshy forms were much injured by mould but none was 

 wholly destroyed, so far as I know. The specimens of Bolcti, 

 probably the cream of the entire collection, have been most gen- 

 erously placed at my disposal by the university authorities for 

 critical examination, and the results of this study will be pub- 

 lished in a short time. 



New York Botanical Garden. 



REVIEWS 



Lewis's Plant Remains of the Scottish Peat Mosses* 



This study by F. J. Lewis of the plant remains of the Scottish 

 peatbogs, of which Part 3 dealing with the eastern and northwest- 

 ern Highlands, Shetland Islands, Outer Hebrides, etc., has just 

 reached this country, is a model in English of the line of work so 

 successfully pursued by Nathorst, Gunnar-Andersson, and others 

 of their countrymen, but published for the most part in Swedish 

 and Danish and consequently inaccessible to most students. While 

 the sequence of events as found by Lewis in Scotland is some- 

 what variable as would be naturally expected when the vary- 

 ing physical conditions of deposition are taken into account, 

 the general order is sufficiently uniform to enable him to make 

 some very interesting correlations between the different areas. 



The following is a somewhat generalized abstract of this march 

 of events in the late Pleistocene : The oldest beds found (exclu- 

 sive of the rock floor) are glacial sands and till which are referred 

 to the fourth Glacial or Mecklenburgian stage. These are followed 

 by desposits containing arctic plants, indicating tundra conditions. 

 Upon these are superposed the peat deposits of the fourth Inter- 

 glacial period with BcUila, Corylus, Potentilla, Mcnyanthes, Salix, 

 etc. This forest bed or scrub is gradually exterminated hySpJiag- 

 num and the indicated wet moorland condition persists to the fifth 



*The Plant Remains in the Scottish Peat Mosses. By F. J. Lewis. Part i, 

 Trans. Royal Soc. Edinb. 41^: 699-724. pi. i-vi. 1905 ; Part 2, Ibid., 45'' : 335- 

 -60. pi. i-v. 1906. Part 3, Ibid., 46' : 33-70. pi. i-iv. I908. 



