EXPLANATION OF THE PLATES. 



Section 5. — From the river Parret, in Somersetshire, to the Avon near Bristol : p. 357. 



A few objects which do not stand immediately in the line of this section, are 

 projected upon it. 



The small section beneath, represents, on the same scales, the position of 

 the conglomerate &c. in the vicinity of Shipham, on a line parallel to that of 

 section No. 5, and to the north-west of it : see p. 363. 



PLATE XL. 



No. 1. Inside view of the anterior portion of the lower jaw of the Megalosaurus on 

 the right side. This drawing is of the actual size of the specimen. 



No. 2. Transverse section of iVb. 1, showing the manner in which the tooth is lodged 

 in the lower jaw. 



PLATE XLI. 



Fig. 1. is the same as PI. XL., fig. 1., reduced to half the actual size. 



Fig. 2. Outside view of JVb. 1. 



Fig. 3. The same as No. 2, PI. XL., reduced to half the actual size. 



Fig. 4. A tooth, showing by the dotted lines the height to which the internal cavity 

 rises. 



Fig. 5. Upper portion of a nearly full grown tooth of the natural size ; its lower 

 edges are very thin, and the root is not yet formed. 



PLATE XLII. 



Fig. 1. Five anchylosed vertebrae, including the sacral portion of the column. 



Fig. 2. Single lumbar vertebra. 



Fig. 3. Single caudal vertebra. 



Fig. 4. View of the articulating surface of No. 2, much reduced in size. It has been 

 a little distorted by pressure. 



PLATE XLIII. 



Fig. 1. Upper portion of a rib, showing it to have had a double head of articulation. 



Its transverse section is given at the two fractured parts a & b. 

 Fig. 2. Small false rib, showing the same double head of articulation as in fig. I . 

 Fig. 3. Exterior view of the Os ilium. 



