70 S. Keeping — The Zone of Niimmulina elegans. 



Levy, Eoclies Eruptives, p. 358). Hence I feel convinced, after- 

 repeated examination, that the presence of felspar in this Eill rock 

 cannot be asserted on the evidence before us, and that it consists 

 chiefly of olivine (more or less altered into serpentine) and aiigite 

 (diallage). Further north the pyroxenic constituent appears to be 

 commonly a colourless hornblende. It is possible that this mineral 

 is also present in the Eill rock, and I think I have detected a graia 

 or tv70 of rhombic pyroxene. 



IV. — On the Discovery of the Nummulina elegans Zone aot 

 Whiteoliff Bay, Isle op Wight. 



By H. Keeping, 

 of tlie Woodwardiau Museum, Cambridge, 



WHEN visiting Whitecliff Bay, Isle of Wight, last September, I 

 was so fortunate as to find exposed on the shore at low-water, 

 the whole of the various strata from the Brook Bed of the Brackie- 

 sham, to the Bembridge Limestone inclusive. I have visited this 

 locality many times, but have never before seen the Barton Series- 

 exposed. On my return to Cambridge, I mentioned the subject to 

 Prof. Hughes, and he suggested that I should make another visit in 

 order to obtain a larger collection of fossils ; but on this second oc- 

 casion, I was surprised to find that the whole of the strata, which I 

 had seen on the shore in September were now covered with sand to 

 the depth of twenty inches. Therefore, seeing that nothing could 

 be done on the shore, I set to work at the cliff, and succeeded in 

 finding the same beds there. 



For the sake of reference I have copied a part of Professor Prest- 



Korrti. 



Sou til. 



1. L. Headou. 2. Upper Bagsliot. 3. Barton Series. 4. Bracklesham Series. 

 Brockenhurst 

 Bed. 



Section in "Whitecliff Bay, Isle of Wight. 



Scale 1 iucli = 150 feet. 



wich's ^ section, which I consider so good that it would be difficult 

 to improve upon it, except by adding details of zones since dis- 

 covered : these are shown by the dotted lines. In ascending order 



^ On the Tertiary "Formations of the Isle of "Wight, Quart. Journ. Geol. Soc. 

 vol. ii. p. 223, plate ix. 1846. 



