392 Notes and Comments. 
THE TRIAS QUESTION. 
Mr. Greenwood gives the following statement of our present 
knowledge of the Trias question :—(1) There is no true line 
of demarcation between the Permian Rocks and the Trias, 
hence the Permo-Triassic system must be dealt with as a whole. 
(2) We must realise that our present topography is, to some 
extent, a restoration of pre-Triassic and Triassic topography. 
(3) The Bunter and Lower Keuper are unconformable, and in 
places show by internal evidence, changes in source of origin, 
and still more in agents of deposition. (4) The materials of 
the various deposits of British Trias are proven to have 
been derived from different sources. (5) The materials of the 
various deposits show marked differences in grain condition, 
cementing material, chemical constitution and methods of 
deposition. (6) No general theory of river or desert origin 
is applicable to all or even any of the deposits. (7) The larger 
moiety of evidence points to arid conditions having prevailed 
throughout the interval of time between the close of the 
upper Carboniferous and the initiation of the Jurassic systems. 
(8) No true correlation of the Triassic or Permo-Triassic 
deposits of Great Britain exists. 
LINCOLNSHIRE NATURALISTS. 
The Tyvansactions of the Lincolnshire Naturalists’ Union 
for I9g15 were received on October 31st. There are the usual 
Sectional Officers’ Reports and the General (this is better than 
‘ Organising ’) Secretary’s Report. The Rev. E. A. Woodrutfte 
Peacock writes on ‘ The East Fen’ with a list of its plants ; 
Miss S. C. Stow adds a further list of ‘ Lincolnshire Galled- 
plants,’ and Mr. Arthur Smith has a lengthy note on ‘ The 
Fishes of Lincolnshire ’ with a list, which includes marine forms. 
This is a contribution to a neglected branch of Lincolnshire 
natural history.* The first paper is a Memoir of Mr. W. Denison 
Roebuck, who will no doubt blush on reading it. The writer, 
the Rev. E. A. W. Peacock, knows how to handle a trowel. 
And nearly all he says is true. But surely, even Mr. Roebuck 
will hardly claim the title of ‘the creator’ which is given him. 
Possibly, however, he 7s a species of trinity, in which case 
the heading to the memoir, ‘ Presidents of the L.N.U.,’ may 
be accurate for once. An excellent portrait of Mr. Roebuck, 
who, by the way, was the President in 1909-10, is given as 
frontispiece.. He is in his robes as Master of Science. With 
the Tyvansactions was issued, separately, a copy of Mr. H. 
Preston’s address to the Union on ‘ Roman Remains at Salters- 
ford,’ as it was considered that the 7vansactions should be con- 
fined to Natural History, as that term is generally understood. 

*In this list a period is sometimes put after the initials of an authority 
quoted; more often not. Why ? 
Naturalist, 
