570 MANUAL OF NATUEAL HISTOEY. 



America. The group offers varied peculiarities in 

 different parts of the world, as in the green-sand of 

 England ; the beds of flints of Saxony and Bohe- 

 mia ; the indurated chalk of Greece ; the white 

 limestone of the Mediterranean ; the quadersand- 

 stein of Saxony, and the beds of sand and clay in 

 America. 



In the Chalk of Jersey, United States, a gralla- 

 torial bird of the genus Scolopax has been disco- 

 vered ; a skeleton of a bird, nearly entire has been 

 met with in the slate of the Swiss Alps ; and a bird, 

 allied to the Albatross, in the white chalk of Eng- 

 land. The Lizard of the Meuse, or Mosasaurus, a 

 marine saurian about twenty-five feet long, with a 

 powerful flattened tail, and intermediate in structure 

 between the Monitor and Iguana, has been obtained 

 from the river adjacent to the quarries of St. Peter's 

 mountain, near Maestricht ; and an allied reptile, 

 the Leiodon of Owen, from the Chalk of Norfolk. 

 From the Chalk near Cambridge, the Raphiosaurus, 

 and from the green-sand of the vicinity of Hythe, 

 the remains of a colossal reptile with fold-like mark- 

 ings on the teeth (the Polyptychodori), and a species 

 of Pterodactyle have also been discovered. The fishy 

 tribes of the Cretaceous group, comprise extinct cy- 

 cloid genera allied to the Salmon, Carp, and Pike, 

 and ctenoids allied to the Perch, found in the upper 

 stages of the Chalk of England and Germany \ Osme- 

 roides Mantellii, and many fishes of the Shark- 

 tribe, belonging to the genera Squalus, Galeus, and 

 Isurus, are also found in this formation. 



