LIST OF WOODCUTS 



Fig. 1. Diagram of teeth of Cionoclon arctatus, page 59. 



2. Sketch of bones of Prolostega gigos, taken at time of discovery, page 99. 



3. Costal hones of a yonug Testiulo polyphemus, page 112. 



4. Ramus of lower jaw of Clidastes propyflion, page 122. 



5. Ramus of Loxocemus bicolor, page 122. 



6. Ramus of Erijx johnii, page 122. 



7. Pelvis and adjacent vertebne of Lioclon proriger, as exposed in the matrix, page 171. 



8. Cranium of Portheits mohssus, page 184. 



9. Femoral hones and ventral fin of a Portheus, from above ; a, from below ; b, from the side, page 192. 

 10. Scapula, etc., and base of pectoral fin of Pelecopterus cliirurgits, Cope, page 244 B, 



