and cultivated patches of drift," and conjectured by the discoverer to have been derived from the immediate vicinity ; but up to the present time they have not been referred to their parent site.
I have determined the following species : —
1. Ammonites margaritatus, Montf.
2. Ammonites Henleyi, Sow. (on the authority of Mr. R. Etheridge).
3. Belemnites umbilicatus, Bl.
4. Pitonillus turbinatus, Moore.
5. Pecten liasinus, Nyst.
6. Pecten acutiradiatus, Schloth.
7. Plicatula spinosa, Sow.
8. Cypricardia cucullata, Goldf.
9. Isocardia cingulata, Goldf.
10. Limea acuticosta, Goldf.
11. Avicula novemcostae, Brown.
12. Rhynchonella acuta, Sow.
13. Rhynchonella variabilis, Schloth.
14. Waldheimia numismalis.
15. Pentacrinus, sp.
16. Hybodus reticulatus, Ag. ?
With the exception of Plicatula spinosa, Avicula novemcostoe, and Rhynchonella variabilis, which range throughout the Lower and Middle Lias, the majority of the determined species indicate an horizon below the Marlstone but above the highest beds of the Lower Lias. The close similarity in lithological composition, and in part in fossiliferous contents, between the Pabba shales* and the blocks found at Ballintoy suggests the probability of the latter having been transferred during glacial times from the Hebrides.
Nevertheless the sandstone blocks from Ballintoy belong unquestionably to the Middle Lias, and appertain to the lower division, which includes the Jamesoni-bed, the lbex-bed, and the Capricornus- bed, and are contemporaneous (if not conterminous) with the Pabba Shales.
February 23, 1870.
Alexander G. H. Harding, Esq., of King's College, and 39 Woburn Place, Russell Square, W.C. ; Thomas Adair Massey, Esq., Barrister-at-Law, 6 Crown Office Row, Temple ; and Samuel Haslett, Esq., Ann Street, Belfast, were elected Fellows of the Society.
The following communications were read : —
- Geikie, Quart, Journ. Geol. Soc. vol, xiv. p. 5 (1858).
