FRONTISPIECE. 



The photograph represents a nearly complete skeleton (R. 3948) of Geosaurus gracilis, 

 v. Meyer, sp., in which the outline of the soft parts, especially of the caudal fin, is 

 preserved. The fore and hind paddles are well shown, but the skull, which was 

 imperfect, has been restored. The total length of the skeleton along the curve is 

 about 3 ft. 8J ins. (114 cm.). 



This specimen was described and figured by Dr. L. v. Ammon in ' Geognostische 

 Jahreshefte,' vol. xviii. (1905) p. 62. A brief description, with figures of the fore 

 paddle and tail, is also given in the Introduction to this volume (p. xi). From the 

 Lithographic Stone (Lower Kimmeridgian) of Eichstadt, Bavaria. 



