240 SAUKOPTEKYGIA. 



47425. The right humerus ; from the Oxford Clay of Northampton- 

 (Fig.) shire. This specimen closely accords with the correspond- 

 ing bone of the skeleton of No. P. 1262, its length being 

 0,267 (10'5 inches), and the width of the distal extremity 

 0,155 (6-1 inches). It has been employed, together with 

 Nos. 47416 and E. 1289, in the figure of the pectoral 

 limb (p. 236), of which the general outline was taken 

 from the crushed paddle of the type skeleton. The equality 

 in the height of the pre- and postaxial surfaces for the 

 attachment of cartilage at the distal extremity is well 

 shown ; and of itself serves to distinguish this bone from 

 the smaller humeri of the C. trochanteric type. 



Sharp Collection. Purchased, 1876. 



47416. A radius ; from the Oxford Clay of Peterborough. Agrees 

 with the corresponding bone of the above-mentioned 

 skeleton. Sharp Collection. 



R. 1289. An ulna ; from the Oxford Clay of Peterborough. This 

 specimen exactly resembles the corresponding bone in 

 the skeletons in the collection of the donor. 



Presented by A. JSf. Leeds, Esq., 1888. 



R. 1290. A fibula belonging either to a larger individual of this 

 species or to an allied form ; from Peterborough. 



Presented by A. N. Leeds, Esq., 1888. 



47431. An ischium of a young individual which may perhaps 

 belong to this species ; from the Oxford Clay of Whittlesea. 



Sharp Collection. 



Cimoliosaurus richardsoni, Lydekker (n. sp.). 

 Syn. Plesiosaurus plicatus, Mansel-Pleydell l . 



Of the approximate size of the preceding ; but the cervical ver- 

 tebras shorter, with flatter terminal faces, and about 31 or 32 in 

 number. In the middle cervicals the length of the centrum is 

 somewhat less than the height. The number of cervical vertebras 

 is taken from an immature skeleton from the Oxford Clay in the 

 collection of A. N. Leeds, Esq., of Eyebury, near Peterborough, 

 which appears to be specifically identical with No. R. 1283. In 

 the skeleton of No. P. 1263 the number of cervicals is given by 

 Mansel-Pleydell as 35, but it is probable that this includes "pectorals." 



Hob. Europe (England). 



1 Proo. Dorset. Nat. Hist. Club, vol. ix. table facing p. 40 (1888). 



