362 Notices of Memoirs — Guppys Foraminifera of Trinidad. 



lines of discontinuity correspond to gaps often considerable ; thus 

 between the Glauconitic Chalk (1) and Marly Chalk (2) there is 

 wanting, in the north and east of the Paris basin, tlie green sands of 

 the Maine, which have a great thickness in Touraine and le Perche, 

 but which thin out to the east before reaching the Seine, and which 

 are represented in the south by the calcaire a Ichthyosaurolites. 

 Again, between the Marly Chalk (2) and the Chalk with Holaster planus 

 (3), there are wanting the great beds of Hippurite Limestone, which 

 form so important a feature in Southern Europe, and which, from 

 the abundance of Hippurites, BadioUtes, SphceruUtes, and allied 

 genera, and the comparative absence of Ammonites and allied forms, 

 readily differentiate the Cretaceous era of Southern from that of 

 Northern Europe. The zone of Micraster coranguinum (5) forms two 

 series ; the lower, well developed in the western, seems to be wanting 

 throughout the eastern part of the Paris basin,^ whilst the Chalk with 

 Belemnites mucronata is absent in the sections exposed along the coast. 

 These lacunae afford a proof to some extent, according to M. Hebert, 

 that the Parisian basin had already emerged during the deposition 

 elsewhere of the missing strata, while at the same time it explains 

 the presence and origin of the hardened surfaces during emersion and 

 their perforation by atmospheric agencies. J. M. 



III. — On Foraminifbka from the Tektiaries or San Fernando, 

 Trinidad.^ By E. J. Lechmere Guppy, F.L.S., F.G.S., etc. 



IN July, 1863, I brought under the notice of the Scientific Associa- 

 tion the nature of the Asphalt Eock figured at page 38 of the 

 Geological Eeport on Trinidad. I then stated that I had discovered 

 that that rock consisted principally of the shells of Orhitoides and 

 NummuUna, two genera of Foraminifera characteristic of Older and 

 Middle Tertiary strata. In the interval between the reading and the 

 printing of the paper in which my discovery was communicated to 

 the Association, the same species of Foraminifera had been detected 

 in the Miocene rocks of Jamaica, as noticed in a postscript to my 

 paper. Previously however to this a few species of Foraminifera 

 had been recorded from the Tertiaries of Haiti. The names of all 

 these species will be found in my paper on the Tertiary Fossils of 

 the West Indies, printed in the Proceedings of the Scientific Asso- 

 ciation, 1867, page 145. 



Owing to the nature of the cliffs at San Fernando, great part of 

 their face is often concealed for many years by earth fallen from the 

 top, but occasionally the loose and disintegrated material is removed 

 so as to expose the solid rock. This has happened lately to such an 

 extent as to expose a large series of beds of which I had never pre- 

 viously been able to get a fair sight. These beds lie (in geological 

 language) just above the Nucula-rock, which I have already described 

 at pages 46 and 82 of the Proceedings for 1866 and 1867, and also 

 in the Geological Magazine, Vol. IV"., p. 497. The mineral com- 



^ Bull. Soc. Geol., 2 ser., t. 29, p. 446, pi. iv. 



- From the Proceedings of the Scientific Association of Trinidad. Deccmher, 1872. 



