500 E. Wilson — Age of the Pennine Chain. 



I have ventured, however, to consider this fossil as distinct, and 

 have named it Terebra subacuminata. 



Formation : — From Tertiary Grey Marl-clay. 

 Locality : — Government of the West Coast of Sumatra. 

 49. Ccelosmilia 1 PL XIII. Fig. 13. 



An imperfectly preserved Coral with the habit of growth of a 

 Ccelosmilia. 



EXPLANATION OF PLATES XII. AND XIII. 

 Plate XII. 

 Fig. 1. Uonus, sp. (cast), Tertiary Coral Limestone, Government of the "West 

 Coast of Sumatra. 

 „ 2. Conus substriatellus, H. Woodw., Gov. of the "West Coast of Sumatra. 

 ,, 3. Cyprc&a subelongata, H. "Woodw. 

 „ 4. Cerithium, sp. (cast) 

 ,, 5. Turbo (Bomeensis ? Bottger) 

 ,, 6. Phasianella Oweni, D'Archiac 

 „ 7. Troehus, sp. (cast) 

 „ 8. Prenaster, sp. 



a upper, b under side (Drawn from a Diagram.) 

 Plate XIII. 

 Fig. 1. Conus Niasensis, H. Woodw., Tertiary Grey Marl, Hiligara, Island of Nias, 

 Government of the Wfist Coast of Sumatra. 

 „ 2 a, b. Oliva mustelina ? Lamarck (subfossil?), Government of West Coast of 



Sumatra. 

 ,, 3. Oliva pseudoaustralis, H. Woodw., Tertiary Grey Marl, Government of 



"West Coast of Sumatra. 

 ,, 4. Oliva pupaformis, H. "Woodw., Government of West Coast of Sumatra. 

 ,, 5. Ancillaria, sp. ,, ,, 



„ 6. Terebellum, sp. (cast). In light-coloured Tertiary Clay-marl, Ditto. 

 „ 7. Cypresa nucleus, Linn. Miocene Clay-marl, Island of Nias. 



„ 8. , sp. (cast) „ „ 



„ 9. Bulla crebristriata , H. Woodw., Ditto, Government of W. Coast of Sumatra. 

 „ 10. Cyprcea erosa, Linn. „ „ 



„ 11. Pyrazus palustris, Linn, (subfossil?) „ ,, 



,, 12. Terebra subacuminata, H. Woodw., Grey Tertiary Marl. „ 



,, 13. Ccelosmilia ? sp. „ „ 



{To be continued in our next Number.) 



IV. — The Age op the "Pennine Chain." 

 By E. Wilson, F.G.S. 



THE " Pennine Chain " is the name (restored about fifty years 

 ago by Conybeare and Phillips from the " Alpes Penini " of 

 the Eomans) for that hilly tract of country that stretches from the 

 borders of Scotland on the North to the centre of Derbyshire on the 

 South. This important range possesses the structure of a great, 

 though complex, anticlinal, the result of a meridional movement of 

 upheaval that took place at a remote period in the physical history 

 of our island. This axis of elevation, which ranges a little west of 

 North through North Derbyshire and West Yorkshire, throws off the 

 Coal-measures of Yorkshire and Derbyshire on the one side, and 

 those of Lancashire and North Staffordshire on the other, with a 

 steeper dip on the West, and a gentler inclination on the East. The 

 maximum of this upheaval is attained in North Derbyshire, where 

 a dome-shaped mass of Mountain Limestone has been exposed at 

 the surface at an altitude of 1500 feet above the sea. 



