xii PREFACE. 



at the right-hand side, and a large turtle at the left- 

 hand side of the foreground. The extinct plesio- 

 saurus, with its swan-like neck, is also depicted ; a 

 weed-laden log of wood, often mistaken for a living 

 animal, being descried beyond the turtle on the left. 

 A giant and true marine snake is seen in turn beyond 

 the plesiosaurus, and the detached fins of porpoises 

 or sunfishes swimming in line the fins appearing 

 as those of a single animal are depicted in the 



distance. 



A. W. 



EDINBURGH, November, 1878. 



