harsh.] ANCHISAURID.E. 147 



It was also found that some of the most bird-like footprints of the 

 Connecticut Valley were not made by birds, but by quadrupeds which 

 usually walked on their hind feet, yet sometimes put their fore feet 

 to the ground. Others occasionally sat down, and left an impression 

 which proved that they, too, were not birds. Still others showed rep- 

 tilian affinities in various ways; so that to-day it may be stated that 

 there is no evidence that any of these impressions in the Connecticut 

 sandstone were made by birds. This is true, also, of similar bird-like 

 footprints from strata of the same age in different portions of this 

 country, and will likewise hold good for similar impressions from other 

 parts of the world. It is quite probable that birds existed during the 

 Triassic period, but at present there is no proof of it. 



AXCHISA UR/DJE. 



A few bones of a dinosaur were found at Upper Milford, Lehigh 

 County. Pa., in 1847, in strata regarded as Triassic. The animal was 

 named Clepsysaurus pennsylvanicus by Dr. Isaac Lea, in the Proceed 

 ings of the Academy of Natural Sciences of Philadelphia, in 1851, and 

 he subsequently described and figured the remains in the Journal of 

 the Academy in 1853. They are now preserved in the museum of that 

 society. 



The next discovery of importance in this formation was reported 

 from Prince Edward Island, Canada. The specimen was an upper jaw 

 with teeth, in good preservation, indicating a true dinosaur of consid- 

 erable size. This specimen was figured and described under the name 

 Baihygnathus borealis by Dr. Leidy in the Journal of the Academy of 

 Natural Sciences of Philadelphia for 1851, and is now in the museum 

 of that institution. 



The next important discovery of a Triassic dinosaur in this country 

 was made in the Connecticut sandstone about 1856, at Springfield, 

 Mass., and portions of the skeleton are now preserved at Amherst 

 College. This animal was a true carnivorous dinosaur, very similar to 

 the first one described, and from essentially the same horizon. This 

 discovery was announced by Prof. Edward Hitchcock in 1858, in his 

 Ichnology of ^ew England, and the remains were described and fig- 

 ured by Edward Hitchcock, jr., in 1865, in a supplement to the above 

 volume. The animal was then named Megadactylus polyzelus, and 

 its affinities have since been discussed by various authors. 



ANCHISAUKUS. 



A discovery of greater interest was made in 1884, near Manchester, 

 Conn. The skeleton of another carnivorous dinosaur of larger size, but 

 nearly allied to the one last mentioned, was found in a coarse conglom- 

 erate, in essentially the same horizon of the Connecticut River sand- 

 stone. This skeleton was probably complete and in position when 

 discovered, but as its importance was not recognized at the time the 

 posterior portion only was saved, which was secured later by the writer 



