50 



Sauropterygia — Plesiosauridce. 



Wall-case, 

 No. 13. 



Table-cases, 

 6, 7, 8. 



like the flippers of a whale, and made up of 5 fingers, com- 

 posed of numei'ous phalanges. The jaws w^ere armed with many 

 simple pointed teeth inserted in distinct sockets. The most 

 comjDlete examples are the Plesiosaurus Hawkinsi, the PI. 



Fig. 66.— a tooth of Foli/pti/chodon 

 interru2Hus (Owen); Greensand, Cam- 

 bridge. 



Fig. 67. — An upper tooth of 

 Pelonetistes ])hilarchus (Seeley) ; 

 Oxford Clay, Bedford, \. 



liG. GS.—rici<ios(i(nas Uairi.,,,^-, (Owen). Anterior and left lateral aspect of a late 

 cervical vertebra, from the Lower Lias of Lyme Eegis, Dorset; co, costal [facet; 

 prz, prezygapophysis ; lAz, postzygapophysig. 



