556 



THE WONDERS OF GEOLOGY. 



Lect. V. 



no certain conclusion can be drawn as to the origin of these 

 impressions.* 



15. Ornithichnites, or fossil footprints of birds. — 

 In the United States of North America, a group of strata, 

 which from the plants (Voltzice), shells (Posidonomya Keu- 

 peri), and fishes (Palceonisci), appears to belong to the 

 Triassic system, occurs in the valley of the Connecticut 

 river, stretching through the states of Connecticut and 



Lign. 126. Foot-mark of a Biped, and impressions of rain-drops; on 

 Sandstone ; Massachusetts, (nat. size). 



Massachusetts ; and a band of similar deposits ranges 

 beneath the Palisadoes of the Hudson, to the interior of 



* See Dr. Buckland's " Bridgcwater Essay" for figures and further 

 details. A fine series of specimens of Chirotherium imprints are in 

 the Brit. Mus. Collect. 



