Geological Transactions. 569 



The " Notice on the Megalosaurus, or great fossil Lizard of 

 Stonesfield," by Professor Buckland, is necessarily much more 

 imperfect than the article just quoted, as only a small portion of 

 the osteology of this immense animal has yet been met with. We 

 have therefore to wait until some fortunate discovery shall cast 

 upon this subject the same light that has been already thrown on 

 the former ; observing in the mean while that the dimensions of the 

 animal to which the thigh bone contained in the Museum at 

 Oxford belonged, must have been, according to the computation 

 of Cuvier, upwards of forty feet long, and of a bulk equal to that 

 of an Elephant seven feet high. A portion of another thigh bone 

 from Cuckfield, Sussex, would double this calculation ; but Profes • 

 sor Buckland, justly observing that the same proportions are not 

 safely to be attributed to recent and extinct species, and that the 

 longitudinal growth of animals does not continue in so high a ratio, 

 calculates the length of this reptile at from sixty to seventy feet. 

 It therefore fully merits the name of Megalosaurus, which has 

 been applied to it. The most important fragment that has yet been 

 discovered, consists of a portion of the lower jaw nearly one foot 

 in length, which is interesting, as developing in a great measure 

 its mode of dentition, and from which it is obvious that this part 

 of the animal must have terminated in a flat, straight, and very 

 narrow snout. 



In an extract from the Minutes of the Society there is given an 

 account of the discovery in the Charmouth diluvium of a very 

 large Elephant's tusk, measuring along its curvature nine feet and 

 a half, one foot six inches and a half in circumference at its larger 

 extremity, and one foot one inch and three quarters at one foot 

 five inches from its apex. Other notices connected with Zoology 

 are interspersed through the volume, especially in the " Notes on 

 the Geography and Geology of Lake Huron : by Dr. Bigsby ;" 

 which contain descriptions of several new species of Orthocera, 

 and of various other organic remains. 



