148 
PROCEEDINGS OF SOCIETIES. 
GEOLOGICAL SOCIETY OE DUBLIN. 
GENERAL MEETING, WEDNESDAY EVENING, MARCH 10, 1858. 
Rev. Professor Hatjghton, President, in the Chair. 
The Minutes of the last Meeting were read and confirmed. Donations 
were announced, and thanks voted. 
The following gentlemen were elected Members of the Society :—- 
1. J. Birmingham, Esq., Millbrook, Tuam, proposed by J. Beete Jukes, 
Esq., and seconded by G. Sanders, Esq.; 2. M. Alphonse Gages, Curator 
of Museum of Irish Industry, Stephen’s-green, proposed by J. Beete 
Jukes, and seconded by G. Sanders, Esq. 
Dr. E. Percival Wright read a paper by Professor Kinahan— 
ON THE ORGANIC RELATIONS OF THE CAMBRIAN ROCKS OF BRAY (COUNTY OF 
WICKLOW) AND HOWTH (COUNTY OF DUBLIN) ; WITH NOTICES OF THE 
MOST REMARKABLE FOSSILS. 
It is necessary to premise that this paper, or at least the subject-matter 
of it, was read at the recent Meeting of the British Association, and also 
embodies three communications of mine laid before this Society last year, 
but not published. I do not now seek to establish any theories, but 
simply to recapitulate the results to which an examination of the loca¬ 
lities of Bray Head and Howth, together with a careful comparison of 
the remains with recent allied forms, have led. The age of the formation 
is admitted, I believe, by all, and, therefore, may be assumed as proved. 
The two headlands, Bray and Howth, embracing, as it were, between 
them the Bay of Dublin, differ strikingly in their structure and in the 
fossils found, both as to amount and kind. A separate notice of each 
will be necessary. 
Howth contains a large mass of Cambrian rocks, chiefly a very fine 
quartzose grit and slate breccia, with a few regularly schistose beds. 
In the locality marked in the maps as Puck’s Rocks I was fortunate 
enough last year to obtain Oldhamia antiqua , of which specimens were 
presented by me to the Museum of Irish Industry. Here also, as well 
as in the rocks about Candlestick Bay, immense beds of tubuli, similar 
to those markings called “fucoids,” and so common in some Silurian 
formations, are met with. These have been proved to be tracks of wan¬ 
dering Annelids. What the true nature of both of these appears to be, I 
will discuss further on. 
At Bray the character of the rocks is very constant. Beds of greenish 
quartzose grit, interstratified with beds of red or grayish-green schist, 
such as might be deposited in a quiet sea, and occasional masses of pure 
quartz rocks. In these proofs of organic life of three types at least have 
been found, viz., Zoophytic, Annellidan, and Molluscan (?). 
