366 GENERAL ZOOLOGY 



Fossil remains of the later part of the Carboniferous Age 

 link the reptiles with the amphibians. Some of the reptiles 

 possessed certain skeletal characteristics of the fur-bearing 

 animals, and they are called theromorphs (beast-formed) on 

 that account. 



On land many species of dinosaurs (terrible lizard) were 

 found ; some of them were, with the exception of some 



Fig. 191. Photograph of a model of a dinosaur (Triceratops). 



(Greatly reduced) 



American Museum of Natural History 



whales, the largest animals ever developed on the earth, 

 reaching, in one case, the possible length of eighty or more 

 feet and the height of nearly twenty feet. This animal was 

 so great in bulk that it is considered hardly possible for it to 

 have' supported such a vast amount of flesh on land, and 

 it is therefore thought that it was aquatic or semiaquatic 

 in its habits. Some of the dinosaurs, as Ceratosau'rus 

 (Fig. 190), were particularly fitted to walk on their hind legs, 

 using the tail as a support. Members of this genus grew to 

 be seventeen feet in height. Hundreds of the footprints of 

 dinosaurs have been found in the sandstone of the Con- 

 necticut valley. Fig. 191 shows a well-known dinosaur, 



