124 



SAUKOPTEKYGIA. 



46796. A considerable portion of the skeleton ; from the Kimeridge 

 Clay of Swindon, Wiltshire. The bones remaining are as 

 follows : — The nearly entire mandible, with the anterior 

 portion of the cranium in apposition. The centra of two 

 cervical and of two anterior dorsal vertebrae, and the neural 

 arches and spines of two vertebrae. Fragments of the 

 pectoral girdle : the imperfect humerus of either side ; the 

 somewhat imperfect femora ; the united tibia and fibula of 

 one side ; the tibia of the opposite side ; and a number of 

 Fig. 37. 



Pliosaurus (cf.) brachydirus. — The crown of a tooth ; from the 

 Kimeridge Clay of Ely. ^. 

 tarsal and a few phalangeal bones. Compared with the 

 bones of the type skeleton figured by Phillips in his 

 ' Geology of Oxford,' pp. 342 et seq., the following points 

 may be noticed. The total length of the mandible is a 

 little short of five feet, about one fifth ] of this length 

 being formed by the symphysis ; and these dimensions 

 coincide very closely with those of the type mandible. The 

 number of the teeth cannot be determined. One of the 

 cervicals (b) is from the middle region of the neck, and, 

 although much broken, shows that the contour of the 

 terminal faces was subcircular. The second cervical (a), 

 which is also crushed, has its terminal faces transversely 

 ellipsoidal, and appears to have been later in the series ; 

 it apparently closely resembles the type anterior cervical 

 represented in fig. 38, showing the strongly marked 

 mammilla. The dorsal agrees with the specimen figured 

 by Phillips on p. 346 ; its length being 0,065 (2*6 inches), 

 and the width 0,105 (4-2 inches). The femur and tibia 

 seem also to agree precisely with the corresponding bones 

 of the pelvic limb figured by Phillips on p. 352. 



Cunnington Collection. Purchased, 1875. 

 1 See note 7, p. 120. 



