56 



VERTEBKATA. 



Owen refers it to the Sylce-eosaurus. It was first described (PhilosopJucal Tran- 

 sactions, 1841) as belonging to the Iguanodon Mantelli. Price, $1.00. 



No. 202. Iguaiiodon Mantelli, Meyer. 



Six Caudal Vertebrae, on slab. 

 This matchless specimen, from the Man- 

 tellian Collection in the British Museum, 

 shows the vertebrae in natural sequence 

 and relative position, with their pro- 

 cesses from thirteen to fifteen and a half 

 inches high. The height of these pro- 

 cessss shows the great vertical breadth 

 of the tail of the Iguanodon ; a feature 

 which argues aquatic habits for the ani- 

 mal. This fossil was found in the 

 Wealden grit at Tilgate Forest, England. 



Size, 2 ft. 6 in. s 22 in. Price, $7.00. 



No. 



203. Iguanodon Mantelli, Meyer. 



Left Femur. This is the largest and most perfect Iguanodon femur in the 

 British Museum. It is remarkable from the combination of mammalian charac- 

 ters which it presents in its well marked head and neck, three trochanters, large 

 rounded condyles, and medullary cavity. The shaft is subquadrangular, and 

 measures twenty-two inches round. It was dug up from the Wealden Clay in 

 Susses, England. Size, 3 ft. 9 in. x 14 in. Price, $7.00. 



No. 204. Iguanodon Mantelli, Meyer. 



Two Claws, Horn (?) and Tooth. The ungual bones are broad, flat and 

 blunt. The third specimen, commonly considered after Mantell as the bony core 

 of a median frontal horn, has been lowered by Owen from the forehead to the end 

 of one of the toes ! The tooth exhibits the peculiar dental characters of the 

 Iguanodon. These specimens are from the same locality and Museum as the 

 preceding. Price, $2.00. 



No. 205. Iguanodon Mantelli, Meyer. 



Track, in relief. This huge tridactyle print, referred by early observers to 

 gigantic birds, has been considered to have been made by the thick-footed, three- 

 toed Iguanodon. This idea is supported by the occurrence of numerous bones of 

 the Iguanodon and other Dinosaurians in the Wealden deposits, where this was 

 found. The marks of the three toes are well defined, the middle one measuring 

 eleven inches in total length. A cup-shaped impression behind is supposed to 

 represent the heel of the Reptile. This track, found in Wealden strata at Hast- 

 ings, Eng., is in the Museum of the Geological Society of London. 



Size, 3 ft. 7 in. x 1 ft. 10 in. Price, $6.50. 



No. 206. Iguanodon Mantelli, Meyer. 



Track, in high relief. From the same locality and Museum as the preced- 

 ing. Size, 18 x 17. Price, $4.00. 



