PLEsiosArEiD^:. 133 



The dental alveoli are - empty, but germ-teeth are shown 

 in a few instances. There are 21 alveoli in each jaw 1 ; 

 and in the cranium there are five teeth in the premaxilla, 

 then there is a gap in the series, beyond which the teeth 

 increase in size till the ninth. The length of the ramus 

 of the mandible is 1,660 (5 feet 10 inches). This speci- 

 men accords so well in relative size with the type femur 

 that there is every reason for referring it to the same 

 species. Presented by J. 0. Mansel-Pleydell, Esq., 1865. 



32775. Fragment of a cranium apparently belonging to this species ; 

 from the Kimeridge Clay of Boulogne, France. This 

 specimen apparently comprises the region immediately 

 behind the 11th tooth, and shows four dental alveoli on 

 the right and three on the left side ; it indicates a larger 

 individual than the preceding specimen. Purchased. 



37408. An entire tooth, with the root somewhat crushed ; from 



{Fig.) Kimeridge Bay. Figured by Owen, op. cit. pt. ii. pi. xii. 



(1862), as P. grandis. The length of the entire specimen 



is one foot; its large size indicates that it belongs to 



the present species. 



Presented by J. 0. Mansel-Pleydell, Esq., 1863. 



47877. The imperfect crown and upper portion of the root of an 



(Fig.) equally large tooth ; from the Kimeridge Clay near Oxford. 



Figured by Owen, op. cit. pt. i. pi. vii. (1861), as P. grandis. 



Presented by the Hon. R. Marsham, 1877. 



37311. Cast of an imperfect tooth of nearly equally large dimen- 

 sions. The original was obtained from the Kimeridge 

 Clay of Ely, Cambridgeshire, and is preserved in the 

 collection of II. Fisher, Esq., at that town. 



Presented by R. Stead Jones, Esq., 1863. 



37312-13. Casts of the crowns and part of the root of two slightly 

 smaller teeth. The originals were obtained with that of 

 the preceding specimen. 



Presented by R. Stead Jones, Esq., 1863. 



40304. The crown and upper portion of the root of a tooth of rather 

 smaller size than Xo. 37408 ; from the Kimeridge Clay 

 of Hartwell, Buckinghamshire. Purchased, l v, '»7. 



40304 a. The crown of a rather smaller and apparently associated 

 tooth ; from Hartwell. Purchased, 1867. 



1 Owen states there arc 26 upper and oO lower teeth. 



