i9i8. HiN'CH, — The Irish Sea Glacier. 63 



theory we get a possible explanation of the extraordinarily 

 high angles which the bedding of the upland sand and gravel 

 deposits display and which cannot be solved by invoking 

 either marine or river action. The deposits of many of these 

 temporary lakes of glacial times occur in the Irish Sea basin, 

 and we need onl}'' mention the deposits of Lake Belfast in 

 Ulster and Lake Andreas in Man as examples. 



Such has been, in broadest outline, the history of the 

 Development and Decay of the Irish Sea Glacier. Many 

 aspects of this history have not been touched upon, and 

 on every point which has been mentioned more extended 

 information from the field is to be desired. It may be that, 

 just as the submergence theor}/ has been discarded, so the 

 Irish Sea Glacier theory may, in the light of fuller know- 

 ledge, be also relegated to the limbo of lost scientific causes. 

 Whatever may be the final decision on the matter, much 

 work remains to be done before a decision can be reached, 

 and in this work the most desirable attitude which can be 

 adopted is an attitude of very active scepticism as regards 

 both observation and theory. 



National Library of Ireland. 



NOTES. 



BOTANY. 

 Some Cork Aliens. 



Writing under this title in the Irish Naturalist, January, 1895 (Vol. iv ' 

 p. 20), Mr. R. W. Scully mentions that in the summer of 1891 he came 

 across the following aliens growing in a rubbish heap beside the river Lee, 

 in the City of Cork : — Alyssuni calycinurn L., Sisymbrium pamionicum, 

 Jac(}., Erysimum orientate, R. Br., E. repandum, L., Camelina sativa Cratz, 

 Lepidium perfoliatum L., Thlaspi arvense L., Anthemis arvensis L., Brumus 

 tectorum L. As he remarks that " it will be interesting to note how long 

 the above will hold their ground, and whether they will spread to neigh- 

 bouring localities," I went over the ground this year (twenty-two years 

 after) and found all those mentioned, with the exception of the two first- 

 named, all thriving well, some being particularly vigorous specimens. 

 Many have spread in the immediate vicinity and further down the river 

 on waste patches near the Marina and Blackrock. I may add that coals 

 from the north of England and Wales are deposited near the rubbish heap 

 and may have been the medium of transit. 



M. Holland. 



Cork. 



