116 ROYAL SOCIETY OF CANADA 



EXPLANATION OF PLATES. 



Plate I. — Thcnaropus hetcrodactyJis, King. Fig-. 1. Hind foot, showing- impres- 

 sions of the claws; reduced %. Fig. 2. Forefoot; reduced %. 

 Fig. 3. Uylopiis Hardingi, Dawson, Track; reduced %. Fig. 4. 

 The same. Hind and forefoot. Natural size. N.B. The re- 

 duced figure shows only four toes on the forefoot. 



Plate II. — Fig 1 Ornithichnintes gallinuloides, King. Also showing claw marks; 

 reduced %. Fig. 2. Apatichnus trifidus. Hind foot; magnified Vi- 

 Fig. 3. Dromopus agUis, Marsh. Hind foot, showing phalanges. 

 Fig. 3a. Fore foot; both natural size. 



Plate III. — Fig. 1. Notolacerta Missouriensis, Butts. Hind foot. Fig. la. Fore- 

 foot; both natural size. Fig. 2. Limnopus vagans, Marsh. Fore 

 and hind foot; natural size. Fig. 3. Hylopus caudifer, Dawson. 

 Hind foot (?); natural size. Fig. 4. Fseudobradypiis unguifer, Daw- 

 son. Series showing the hind feet, greatly reduced. Fig. 5. 

 JSanopus caudatus, Marsh. Hind foot. 5a forefoot; both natural 

 size. Fig. 6. Baropus lentus, Marsh. Series of footprints in 

 pairs; the forefoot in advance; reduced Vi2- 



