Jl-lv, 1911. 



KNOWLEDGE. 



259 



reptiles with an astounding abundance of forms 

 which are the more remarkable as the structure of 

 their skeletons giv-es evidence of a continuous 

 transition to the bird class of animals. 



One of the largest among these monsters, beside 

 which the surrounding trees look small indeed, is a 

 giant Iguanodon (see Figure 3), the head of which 

 towers some twenty-five feet above the ground. 

 This weird creature habitually walked on its bird-like 

 hind legs as proved by the enormous foot-prints up 



possessed a tropical climate and included e.xtensive 

 lakes of salt water, the sedimentary remains of 

 which form the "bad lands" of our day. The 

 Diplociociis. sixty-six feet in length, at the Stellingen 

 Park, has been reconstituted from the most complete 

 and not from the largest bone finds of its kind. 

 This mammoth lizard possessed a tail even longer 

 than the Iguanodon. while the hind-legs were not 

 much longer than the fore-legs, thus enabling the 

 beast to use all four limbs for walking about. The 



FlGL'KE 5. 



Rhinoceros Saurians. 



to thirt\' inches in length and forty-five feet apart 

 which have been found in the weald of Sussex. 

 The erect position and bird-like gait of this beast 

 was assisted by the extreme bulk of its tail : the 

 neck w as relativelv long, the arms short and the first 

 and fifth fingers stood out nearl\- at a right angle to 

 the three middle fingers. However, the head was 

 surprisingly small and this limited provision of brain 

 ob\-iousl\' failed to protect the Iguanodon in its 

 struggle for life. 



Another dinosaur species, the Diplodocus (see 

 Figure 4) bears a certain resemblance to the former, 

 but is of even hugcr dimensions. This animal 

 lived in W\oming. Montana. Colorado, New 

 Mexico and the Dakotas, which countries then 



enormous length of the neck and remarkable 

 smallness of the head are equally striking. 



Between the place where the Iguanodon stands, 

 and that reserved for its fellow, the Diplodocus, 

 visitors can watch a charming id\li of ten million 

 vears ago (see Figure 5). A family of " rhinoceros 

 Saurians" (Tricerafops) has come to the lake, and 

 the father lustily disports himself in the water from 

 which only his head and shoulders are seen to 

 emerge, while the mother with her little one still 

 lingers at the water's edge. Apart from the thick lizard 

 tail, characterising them as reptiles, these strange 

 animals strikingly remind us in general appear- 

 ance of the rhinoceros of our day. The Tricerafops 

 had three liorns, a beak like a bird of prey, 



