Vol. 60.] THE DISTRICT SURROUNDING THE DARDANELLES. 295 



It is deduced from other palseontological evidence that these beds 

 are of Lutetian age. There appears to be nothing in the forami- 

 niferal evidence to conflict with this view. 



EXPLANATION OF PLATE XXY. 



Fig. 1. yiimmulitcs Bufrenoyi, D'Archiac, form B. External view, showing the 

 delicate sinuo-striate filets cloisonnaires. Natural size. 



2. y. Bufrenoyi, D'Archiac, form B. Transverse section in matrix. 



Natural size. 



3. A'. Bufrenoyi. D'Archiac, form B. Segment of central whorls on the 



median plane of a split section. X 10. 



4. A". Bufrenoyi, D'Archiac, form A. Central whorls on the median plane 



of a split section, x 8. 



5. A', disfo.ns. var., Deshayes. form B. Central whorls on the median 



plane of a ground section — the first few turns wanting. X 10. 



6. A", (listens, var., Deshayes, form A. Central whorls on the median 



plane of a split section, x 10. 



Discussion. 



The President said he considered that the paper was an excellent 

 illustration of the value of geology in throwing light upon the 

 origin of the present superficial features of the earth . 



Dr. C. W. Andrews thought that remains of Anthraeotherium 

 were not of very great value for the determination of horizons, as 

 that genus had a considerable range, and closely- allied forms occurred 

 in the Upper Eocene and Miocene of Egypt. Nevertheless, its occur- 

 rence in the Dardanelles area was of extreme interest, and further 

 finds might well throw considerable light on the distribution of the 

 early Ungulates. 



Mr. R. B. Newton pointed out that there could be no question as 

 to the Oligocene age of the Anthracotherium-Temaiiis obtained from 

 the coal-deposits at Masatly, since they were found associated with. 

 Corhicv.lci semistriata . a very characteristic shell of that period. 



Mr. A. P. Young said that it seemed likely that some of the 

 igneous rocks exhibited would, on analysis, yield interesting 

 results. The green pyroxene observed in one of the slides might 

 prove to be wholly or in part a soda-iron silicate, such as frequentlv 

 crystallized out from magmas in which the alumina-constituent 

 was deficient, in respect of alkalies. 



The Author thanked the Fellows present for the reception 

 accorded to his paper. 



