EXPLANATION OF THE PLATES. 



PLATE XXXIV. 



Illustrates Mr. Poulett Scrope's paper on the Volcanic District of Naples. 



Fig, 2, Map of the Volcanic District of Naples. 



The other figures are sufficiently explained in the paper, and in the description 

 at the foot of each. 



PLATE XXXV. 



Illustrates Mr. Murchison's paper on the Strata of the Oolitic Series in Sutherland, 

 Ross, and the Hebrides. 



Fig. 1. Map of that part of the west of Scotland, and the Hebrides, in which are found 

 the deposits of the oolitic series alluded to in the preceding Memoirs. 



Fig. 2. Section on the line a 6 of the map ; representing the different members of the 

 oolitic series, in their actual order of superposition on the coast of Skye and of 

 the adjoining Isles of Rasay, Scalpa, and Pabba. All the intrusive or over- 

 lying trap-rocks, which occur so abundantly along this line of section, are omitted ; 

 as having been completely elucidated by Dr. MacCulloch, Geol. Trans, vol. iv. 

 page 172 et seq. 



(The occurrence of a freshwater stratum overlying the oolitic series is particu- 

 larly deserving of attention.) 



Fig. S. Sectional view of the south coast of Mull, on the line c rf of the map, exhibiting 

 the inferior oolite regularly overlying the lias at Carsaig ; and the same deposits 

 at various other places in contact with vast masses of basalt and trap, which pro- 

 duced considerable alteration in the characters. 



PLATES XXXVL XXXVII. XXXVIII. XXXIX. XL. XLI. XLII. 



XLIII. XLIV. 



Illustrate Mr. Clift's paper on the Fossil Remains of two new species of Mastodon and 

 of other Vertebrated animals, found on the left bank of the Irawadi : and Profes- 

 sor Buckland's Geological Account of the Animal and Vegetable Remains there 

 found. 



Plate XXXVI. 

 Upper jaw of Mastodon latidens (adult), showing the palate and anterior molar teeth 



