SUPPLEMENT. 227 



articulation of a cervical rib. The pelvis and sacrum exhibit the 

 characteristic features of the genus ; the ischium being anchylosed 

 to the ilium, and the latter attached to four vertebrae of the sacrum 

 by anchylosed ribs. 



Hab. Europe (England). 



R. 1755. Portions of the skeleton ; from the Oxford Clay, St. Ives, 

 Huntingdonshire. The types. These comprise several 

 vertebras, from the cervical, dorsal, and sacral regions ; the 

 imperfect ilia and ischia ; one femur, and the distal half of 

 another ; and some other fragmentary bones. 



Presented by T. Jesson, Esq., 1890. 



Order CROCODILIA (supra, i. p. 42). 



The Metriorhynchince (infra) show that the presence of dermal 

 scutes and the absence of sclerotic plates are not invariable charac- 

 teristics of the order. 



Family CROCODILIDJS {supra, i. p. 44). 



Generically Undetermined Remains. 

 From the Pliocene of the SiwaliJc Bills, India (supra, i. p. 57). 

 These specimens belong to the Cautley Collection. Presented, 1840. 



R. 954. A slightly imperfect right coracoid, remarkable for its 

 extreme curvature. 



R. 952. The imperfect proximal extremity of the right humerus of 

 a very large individual. 



R. 952 a. The proximal half of a smaller left humerus. 



R. 947. The distal half of a right humerus. The radial condyle is 

 very strongly developed. 



R. 947 a. The distal half of a similar right humerus. 



R. 948. The distal extremity of a right humerus. The radial con- 

 dyle is less prominent than in the preceding specimens. 



R. 949. The distal extremity of a rather smaller right humerus. 



R. 945. The distal portion of the left humerus of a very large 

 individual, in a somewhat waterworn condition. 



