VINE : POLYZOA OF THE LOWER AND UPPER GREENSA.^D. 275 
4-4a. Proboscina ,, another colony of the same. 
5. ramosa, D'Orb. 
6. „ ; Various characteristic frag- 
7. ,, ments of this species. 
>> >) }) , 
9-9b. Diastopora Hagenowii, Reuss. 
10-lOb. „ foecunda, Vine. Very young example. 
11. Lichenopora ? compressa, D'Orb. 
GLACIAL SECTIONS NEAR BRIDLINGTON. PART IV. 
BY G. W. LAMPLUGH. 
Introduction. — In writing the last paper of this series in 1883, 1 
surmised that with it the series would probably close, but since that 
time events have happened which render it advisable that I should 
add one more part, making the fourth. In doing so, I think it will 
be profitable first to glance at the ground already covered by these 
papers. The primary object of the series was, as stated in Part I., to 
describe sections in the neighbourhood of Bridlington, which were 
* likely to be destroyed, either by artificial or natural means,' to give 
careful sketches where the beds seemed complicated or unusual, and 
in all cases to give as clear and unbiassed a description as I could, 
so as to preserve any information the section might contain, for the 
benefit and use of future geologists. But, while thus describing the 
sections in their entirety, I aimed in each case to give prominence to 
some particular member of the section, generally selecting the feature 
which was best developed, and by this method I hoped in time to 
compass the whole of the drifts, and supply full details regarding 
every part of them. 
In pursuance of this plan, I described in Part I., published in 
the Proceedings for 1881,'" the cliff-section opposite the Alexandra 
Hotel, now concealed by a sea-wall, and dealt in that paper principally 
with the cause of the curiously ragged junction of the Purple Boulder- 
clay with the overlying gravels. In Part II., published in the 
* Proc. Yorksh. Geol. and Polyt. Soc.'JJ.S. vii., p. 383. 
