136 Reports and Proceedings, 



Mr. D. Forbes commented on the similarity of the rocks to those of the Andes in 

 South America. In the Andes the porphyritic tuffs appeared to belong to the Oolitic 

 age ; and the igneous rocks associated with them were of the same date. He thought 

 that, so far as the author's observations had gone, the structure of the Atlas was much 

 the same as that of the Andes. 



Mr. W. W. Smyth mentioned that in the district to the east of the Sierra Nevada, 

 in the south part of Spain, where there was great summer heat, and also heavy 

 occasional rainfall, the same tufaceous coating as that observed in Marocco was to be 

 found. He had been led to much the same conclusion as to its origin as that arrived 

 at by Mr. Maw. The upper part was frequently brecciated, and the fragments re- 

 cemented by carbonate of lime. 



Mr. Seeley, though accepting Mr. Etheridge's determination as to the Cretaceous 

 age of Mr. Maw's fossils if found in England, could not accept it as conclusive in the case 

 of fossils from Marocco. The genus Exogyra, for instance, which ranges through the 

 secondary to existing seas, might well belong to some other age ; and even the fossils 

 presumably Miocene might, after all, date from some other period. 



Mr. Maw, in reply, stated that he agreed with Mr. Ball as to the rise in the Marocco 

 plain as it approached the Atlas, having taken it in one direction at 400 feet in 25 

 miles. He pointed out the resemljlance between the moraines in the valley of the 

 Ehone and those which he regarded as such on the flanks of the Atlas. As a proof of 

 their consisting of transported blocks, he mentioned the fact that the red sandstone 

 rock of which they were composed did not occur in the adjacent escarpments, but was 

 not to be found within seven or eight miles. There was, moreover, a mixture of 

 different materials in the mounds. 



II. — January 24, 1872. — Joseph Prestwich, Esq., F.E.S., President, 

 in the Chair. The following communications were read: — 1. "On 

 the Foraminifera of the Family Eotalinse (Carpenter) found in the 

 Cretaceous Formations, with Notes on their Tertiary and Eecent 

 Eepresentatives." By Prof. T. Eupert Jones, F.G.S., and W. K. 

 Parker, Esq., F.E.S. 



The authors enumerated the EotalinEe which have been found in 

 the Cretaceous rocks of Europe, and showed by tabular synopses the 

 range of the species and notable varieties in the different formations 

 of the Cretaceous system. For the comparison of the Tertiary Eo- 

 talinse with those of the Cretaceous period the following Tertiary 

 formations were selected : — The Kessenberg beds in the Northern 

 Alps, the Paris Tertiaries, the London Clay, the Tertiary beds of 

 the Vienna Basin, and the English and Antwerp Crags. The authors 

 also enumerated the recent Foraminifera of the Atlantic Ocean. 



The authors stated that of Planorbulina several species and im- 

 portant varieties of the compact, conical form occur throughout the 

 Cretaceous series, and that those of the Nautiloid group are still more 

 abundant. The plano-convex forms are represented throughout the 

 series by P. (TrimcatuUna) lohatula ; but the flat concentric growths 

 had not yet come in. Planorbulina extends down to the Lias and 

 Trias. Fulvinulina repanda is feebly represented in the uppermost 

 Chalk, but forms of the " Menardii" group abound throughout the 

 series. Species of the "elegans" group are peculiarly characteristic 

 of the Grault, and some of the " iSckreibersii " groiap are scattered 

 throughout. These two groups extend far back in the Secondary 

 period. The typical Botalia Beccarii is not a Cretaceous form, but 

 the nearly allied B. umbilicata is common. Tinoporus and Patellina 

 occur at several stages ; Calcarina only in the Upper Chalk. 



The above-mentioned types are for the most part still living, but 



