152 
PROCEEDINGS OF SOCIETIES. 
tain wrinkled markings, possibly the casts of a flat Algal from both 
Howth and Bray. Time will not permit me to enter more fully into 
this interesting subject. Nothing remains, then, but to sum npthe con¬ 
clusions at which I have arrived from this examination, which are :— 
1st. That at the period of the formation of these rocks the seas (?) 
in which they were deposited teemed with life of types similar in orga¬ 
nization, habits, and conditions of life, with those in post-existent adja¬ 
cent seas. 
2nd. That these were Zoophytes (probably anthozoary) of at least 
two species: Annellides of several types, highly organized, and pro¬ 
bably Mollusca and Acalephae. 
3rd. That, judging from the conditions in which these fossils are 
found, the animals lived, died, and were deposited in a shallow, quiet 
sea, and adjacent to some beach which was uncovered at certain in¬ 
tervals. 
DESCRIPTION OE PLATES. 
Plate YI., Pig. 2.—Head of tube of Histioderma Hibernicum {Kin.), 
showing crossing tracks of tentacle casts. Pig. 1.—Cast of middle of 
tube somewhat compressed, proving membranous nature of tube. Both 
from Bray Head. 
Plate VII. Pig. 2.—Portion of slab from Pam’s Skelp, Bray Head, 
exhibiting tracks. (Molluscan) (?). Pig. 1.—Closely crowded Anneli- 
dan tracks, from Puck’s Rocks, Howth. Pig. 4.—Section of tube of 
Aphrodite aculeata , dredged at Bray (recent). Pig. 3_Restoration of 
Histioderma Hibernicum , taken from actual specimen. 
Mr. J. Beete Jukes said that, while investigating the rocks in the 
county of Kildare, near Old Kilcullen, he had discovered an Oldhamia, 
which had been pronounced as a new species in London; and, on com¬ 
paring it with the one described by Dr. Kinahan, he was struck by the 
apparent similarity between the two. 
Professor Haughton then left the Chair, which was taken by Mr. J. 
Beete Jukes. 
Professor Haughton then read a description, by M. Delesse, of the 
Granites and Traps of Newry. 
Mr. J. Beete Jukes read a letter from Mr. P. Stanley, of Tullamore, ad¬ 
dressed to Dr. Apjohn, giving some description of the bogs of that neigh¬ 
bourhood. The writer stated that the substratum of the bogs in that part 
of the country was generally drift sands and gravels, occasionally inter¬ 
mixed with boulders, clays of a tertiary date being sometimes formed be¬ 
neath, but always covered by drift. The bogs occur in patches varying in 
extent from a few perches to several thousand acres, and in depth from a 
few inches to thirty or forty feet. The shallow bogs consist of one stra¬ 
tum, the deep ones of four strata. The shell marl, sometimes occurring 
beneath the bogs, consisted chiefly of the remains of shells of a tiny 
aquatic snail, of a species which, if not extinct, is very scarce in the lo¬ 
calities where it was once so plentiful. The snail is found at different 
