63 [Senate 



ORDEE TETRAPODICHNITES (Hitchcock). Four-footed tracks. 



No. 7. A Slab of geat, perfectly smooth, micaceous sandstone, 

 thirteen by four and a half inches, from Turner's falls on the 

 Connecticut river. 

 On the upper surface of the specimen are impressed four consecutive 

 right and left tracks of the hind feet, and also four tracks of the front 

 feet. The hind tracks are an inch and a half in length, and the stride is 

 six inches. The front tracks are placed a little outwards and near the 

 front of the hind tracks, and are only one-fourth of their size : they 

 resemble in appearance the feet of the snapping turtle ( CheUmura ser- 

 pentina^. There are also several coprolites intbedded on the surface of the 

 slab. These tracks are named by Prof. Hitchcock, Batrachoidichnites 

 deweyi. See American Journal of Science for October 1844, Vol. xlvii, 

 p. 308, for description and dravs^ing. 



No. 8. A Slab op gray, perfectly smooth, micaceous sandstone, 



from Turner's falls on the Connecticut river, twenty by five and 



a half inches. 



This slab is the counterpart or cast of the foregoing (No. 7); and 



presents on its under side six consecutive right and left tracks of the front 



and also of the hind feet, in relief. The hind tracks are an inch and a half 



in length, while the front tracks are not more than one-fourth of that 



size. This is, without doubt, the most perfect and illustrative specimen 



of the JBatrachoidichnites deioeyi ever found. 



No. 9. A Slab op Gray Micaceous Sandstone from Turner's falls 

 on the Connecticut river, six and a half by three inches. 

 This slab presents, upon its upper surface, six consecutive prints of the 

 right and left hind feet of a small quadruped. The tracks are five-eighths 

 of an inch in length, and resemble the JSatrachoidichnites deweyi of 

 Hitchcock. The step or stride is only two inches in length. The hardness 

 of the mud at the time the quadruped traversed it, and the smallness of 

 its front feet, are undoubtedly the reasons why they made no impressions 

 on the surface. 



FOSSIL FISHES. 



There are eighteen slabs of Bituminous Shale from the celebrated locality 

 at Sunderland (Massachusetts), each of which has upon its surface 

 a beautiful Fossil Fish. 

 These fish vary in length from five inches to a foot, and are generally 

 perfect specimens. In most of the specimens, the scales and fins are dis- 

 tinct and well defined; and several of the fish are accompanied with 

 coprolites. The fish belong to the Genus Eschtpterus of Edgerton. 



