EXPLANATION OF THE PLATES. 



Plate IV. 



Figs. 1 & 2. Fossil bodies, which appear to have the external defensive organs of some 

 fish, found in the lias near Lyme : p. 43. 



Fig: 2, exhibits the alternate position of the teeth-like processes in two rows, seen in 

 profile in fig. 1. 



Fig. 3. A transverse section of fig. 1. at &. 



Figs. 5, 6, 7, 8, 9 & 10. Fossil bodies resembling palates or teeth, found in the lias, 

 near the fossil represented in figs. 1 & 2 : figs. 4 «& 5 are rare varieties : fig, 6 

 the most common. 



Plate V. 



Figs. 1 & 2. The side and front views of a very rare fossil, which appears to belong to 

 the same class with that represented in Plate IV. figs. 1 & 2. 



Fig. 3. A fossil jaw with a triple row of teeth, from the lias of the neighbourhood of 

 Lyme ; in the collection of Colonel Birch. 



Fig. 4. shows the position of the four rows of teeth in another specimen, similar to 

 fig. 3; in the same collection. 



Plate VI. 



Fig. 1. represents a specimen of the Dapaedium politum, described p. 45: the inte- 

 rior of the mouth is shown in fig. 2, and two of the teeth in fig. 3. 



Fig. 4. The inner side of two contiguous scales of the Dapaedium politum, showing 

 the acute process, which projects from each scale and fits into a corresponding- 

 depression in the adjoining one. These processes are not visible on the outside. 

 — page 45. 



Plate VII. 



Fig. 1. Another fossil fish from the lias near Lyme : p. 45. 



Figs. 2 & 3. Fossil ferns, from the lias of Axminster in Devonshire, in the collection 

 of Professor Buckland.— Drawn by Mr. Sowerby. Fig. 2. is from the white: 

 fig. 3. from the blue lias. 



Plate VIII. 



Sectional views of the coast of Dorset and Devon, from Bridport Harbour on the east, 

 to Sidmouth on the west ; with colours indicating the several rocks. 



PLATES IX. X. & XI. 



Illustrate Mr. De La Beche's paper on the coast of France, Art. VI. p. 73, &c. 



Plate IX. 

 Figs. 1, 2, & 3. Sections, on the lines AB,CD, and EF, on the map, Plate XL The 



