752 



HISTORICAL GEOLOGY. 



holding their bodies raised against trees or other objects; and hence there 

 ■was great convenience in having the bones of the anterior part of the body 

 celkilar and thereby light. 



1173-1177. 



1175 1174 



k % 



' 1174 



1175 o 



1173 



DiNOSAURiANS. — Fig. 1178, Macropterna divaricans (x |); 1174, Apatichnus bellus (xj); 1175, Anomcepus 

 scambus, fore foot (xj); 1175a, hind foot of same; 1176, Otozoum Moodii, fore foot; 1176a, hind foot of 

 same (both x^V) \ 1177, Brontozoum giganteum (x J). All from Hitchcock. 



1178. 



The track represented in Fig. 1177 occurs from 14 to 18 inches in length, 

 and was made by one of the hi'ped Dinosaurs ; it is the Brontozoum giganteum 



of Hitchcock. The tracks 1175, 1175 a, 

 also much reduced, are of another bird-like 

 Dinosaur, but one that had three-toed feet 

 behind (1175 a), and a small foiir-fingered 

 hand in front that was only occasionally 

 brought to the ground. The track 1176 a, 

 20 inches long natural size, is of the hind 

 foot of an Otozoum, a gigantic Dinosaur that 

 usually walked erect, biped-like ; its much 

 smaller fore feet (1176) served as hands, 

 for they were seldom brought to the ground. 

 The stride of the Otozoum was a yard in 

 length. The other lines of tracks, 1173 and 

 1174, are of species that walked on all fours. 

 These tracks indicate three kinds of 

 Dinosaurs : (1) bipeds with the hind feet 

 3-toed ; (2) bipeds with the hind feet four- 

 toed; (3) quadrupeds walking on all fours. 



A slab of sandstone, with its footprints in several series, is represented in 



Slab of sandstone, with footprints. Hitchcock. 



