396 Professor Buckland on the Megalosaurus. 



The articulating faces of the body of the vertebrae are nearly flat surfaces, 

 as in most of the fossil crocodiles, and in the plesiosaurus ; their proportions 

 will be at once seen by reference to the Plate XLII., in which fig. 1. repre- 

 sents a portion near the sacrum, figs. 2. and 3. the supposed lumbar and cau- 

 dal vertebra?. 



Ribs and supposed Parts of the Pelvis. — Both of the ribs figured at Plate 

 XLIII. figs. 1. and 2. have a double articulation with their respective vertebrje; 

 the smaller one, fig. 2., is apparently one of the anterior false ribs ; two trans- 

 verse sections of the larger one at a. and b. show its proportions at the points 

 of fracture. 



The bone represented in fig. 3. is the outside view of the ilium, slightly 

 concave. The inner surface is slightly convex, and shows marks of its articu- 

 lation with the sacrum. 



With regard to the os pubis, I am inclined to consider the specimen fig. 4. 

 as forming this bone, but speak with hesitation, as it may be the coracoid pro- 

 cess of the scapula : fig. 5. appears to be the ischium ; it is very strong and 

 solid, being nearly three inches thick throughout : fig. 6. appears to be a 

 fragment of a scapula ; it is from an inch and a half to two inches thick. 



Extremities. — These will best be understood by reference to Plate. XLIV. 

 in which figs. 3. and 4. are two views of the same bone, apparently a clavicle ; 

 figs. 1. and 2. are two opposite views of the same bone, viz. the largest 

 femur I have from Stonesfield. The medullary cavity of this bone is very 

 large, and is frequently filled with a mass of white calcareous spar ; the sub- 

 stance of the bone is extremely compact and brittle. Fig. 5. is apparently a 

 fibula ; and fig. 6. a portion of a large bone of the metatarsus or metacarpus. 



