$08 STRATIGRAPHICAL GEOLOGY. — [Book VI 
Lizards are represented by Raphiosaurus, Coniosaurus, Dolichosaurus, 
and Letodon. The gigantic Mosasaurus, placed among Lacertilians 
by Owen, but among “pythonomorphs” by Cope, is estimated 
to have had a length of 75 feet, and was furnished with fin-like 
paddles, by which it moved through the water. True crocodiles 
frequented the rivers of the period, for the remains of several genera — 
have been recognized (Goniopholis, Pholidosaurus, Diplosawrus). ‘The 

Fic. 394.—Creraceous CEPHALOPODS, 
a, Turrilites costatus (Lam.) (4); 6, Crioceras Emerici (Lév.) (4); ¢, Baculites anceps 
(Lam.) (4): d, Ammonites (Acanthoceras) rothomagensis (Brong.) (4) ; e, Ammonites 
varians (Sow.) (4). 
ichthyosaurs and plesiosaurs were still represented in the Cretaceous 
seas of Europe. ‘The pterosaurs likewise continued to be inhabitants - 
of the land, for the bones of several species of pterodactyle have been 
found, ‘These remains are usually met with in scattered bones, only 
found at rare intervals and wide apart. In a few places, however, 
reptilian remains have been disinterred in such numbers from local 
deposits as to show how much more knowledge may yet be acquired 

