REPTILIA. 



43 



sandstones of the Connecticut Valley. The stride was thirty-eight inches, so 

 that the same limb covered at each step nearly seven feet. This impression 

 was discovered by Dexter Marsh, in the Sandstone at Northampton, Mass., 

 and belongs to the Boston Society of Natural Histor3^ Size, 20 x 15. 



No. 62. [193] Brontozoum Sillimanium, Hitchcock. 



Tracks, on slab, in 

 relief (cast). This speci- 

 men exhibits about fifty 

 tracks with the pha- 

 langeal and claw im- 

 pressions exceedinglj' 

 distinct. The smaller 

 tracks were made by 

 the B. Sillimanium, and 

 the larger by B. exser- 

 tum, Hk. The length 

 of the middle and outer 

 toes of the former is 

 between four and five 

 inches, of the foot about 

 six inches, and of the 

 step twenty-three inch- 

 es. Width of the track- 

 way, four and a half 

 inches. The middle and 

 outer toes of the latter 

 measure six inches; the foot nearly three inches, and the step thirty inches. 

 The slab also contains the crooked trackway of the Cunicularius retrahens, 

 Hk., and mud veins. The original was discovered in the micaceous sandstone 

 (Trias) at Middletown, Conn., and is in the Appleton Cabinet at Amherst. 



Size, 4 ft. 10 in. x 3 ft. 1 in. 

 No. 63. [195] Anomoepus major, Hitrh. 



Tracks, on slab (cast). This di no- 

 saurian reptile had tridactyl hind-feet 

 with clawed toes, heels, and phalanges 

 of a bird; but the fore-feet (not repre- 

 sented on this slab) had five toes. In 

 walking on its hind legs only the crea- 

 ture brought the whole tarsus and heel 

 on the ground, in the manner of a kan- 

 garoo. From a fifth, heart-shaped, 

 impression behind, it is inferred that it 

 possessed a stout caudal appendage. 

 The length of the hind-foot is 16^ inches. 

 The original was discovered in the red 

 sandstone (Trias) at Gill, Mass., and is 

 in the Appleton cabinet at Amherst. 



Size, 2 ft. 3 in. x 19 in. 



