SYSTEMATIC INDEX. 



Page 



Order ICHTHTOPTEEYGIA 1 



Family Ophthalmosaurib^ 2 



Genus Ophthalmosaurus . 2 



„ ieenieus 61 



Order SAUEOPTEEYGIA . 77 



Suborder PLESIOSAURIA .............. 77 



Family ElasmosauridjE .............. 77 



Genus Mursenosaurus 77 



„ leedsi 120 



,, durobrivensis 127 



„ platyelis 134 



Genus Picrocleidus 139 



„ beloclis • . . . . 140 



,, sp. . 146 



Genus Tricleidns 149 



„ seeleyi 149 



Genus Cryptocleidus 164 



„ oxoniensis . 164 



c2 



