334 Reports and Proceedings — Oeological Society of London. 



of England. The above two beds therefore constitute the Upper 

 Greensand in Ireland, l^he Exogyra columba and Inoceramus Crispi? 

 zones were both considered by Tate as Cenomanian, and by Barrois 

 as Turonian. In the present paper they are considered as absolutely 

 distinct, the Exogyra columba zone being truly Cenomanian (as 

 limited by Jukes-Browne and Hill) ; the Inoceramus Crispi ? zone, 

 on the contrary, being similar in its fauna to the Chalk Rock and 

 lowest Senonian beds in England, and on theoretical and faunal 

 grounds being in preference assigned to the latter. 



The Micrastei'-zones of the Senonian have been directly recognized, 

 but the higher ones of Belemnitella vera (Marsupites) and £. qiiadrata 

 are well represented. The nodular beds at the base of the White 

 Chalk are of varying age, but generally referable to the above two 

 zones. The conclusion arrived at is that there was a gradual 

 depression followed by a partial elevation, and subsequent de- 

 pression of a far more pronounced character. The Central Division 

 being nearer the shore, the deposits of detrital material here formed 

 were thicker, but at the same time during the period of elevation 

 the denudation was more considerable, so that the unconformity is 

 very marked ; in the Eastern Division, where the sea is con- 

 sidered to have been deeper, the detrital deposits were not so thick 

 and denudation less pronounced ; on depression commencing at the 

 beginning of the Senonian period, limestones containing a Chalk 

 Eock fauna were being laid down here, while denuding influences 

 were still active in the Central area. Speaking generally, there 

 was a deepening northward of the Cretaceous sea, but the high 

 ground in the north of county Antrim and south of Lisburn was 

 the cause of the very marked beach and conglomeratic features 

 observed in the Peninsular and Southern districts, 



(4) General Questions. — The author here touches on and dis- 

 cusses (i) the occurrence of certain organic remains in the glauconitic 

 sands and yellow sandstones of the Eastern division, which suggest 

 higher zonal conditions than those indicated by the species with 

 which they are associated ; (ii) the. great development of the 

 Exogyra columba beds south of Belfast and their feebleness north 

 of that town, while the opposite holds in the case of the strata 

 with Jnocera77iiis-fragments and Spondylus speciosus ; (iii) cases of 

 unconformity and overlap in the series ; (iv) the existence of 

 definite beaches of Upper Chalk age ; (v) evidence in favour 

 of the influence of currents ; (vi) the relation of the Spongiarian 

 bands to the strata above and below ; (vii) faunal repetitions ; and 

 (viii) the general distribution of the Bbynchonellce and Terebratulce. 



2. "An account of the Portraine Inlier." By C. I. Gardiner, 

 Esq., M.A., F.G.S., and S. H. Eeynolds, Esq., M.A., F.G.S. 



At the north-western corner of the inlier a coarse conglomerate, 

 referred to the Old Eed Sandstone, dips in a north-westerly direction, 

 and from beneath it a series of green and purple andesites having 

 a south-easterly dip appear. These andesites have undergone con- 

 siderable change since their extrusion. They are succeeded by 

 a conglomerate of varied character, of which the matrix is at first 



