by W. J. Plows. 



65 



nation in the sediments. The shell conglomerate 



laid down on or near a sea beach. Many of the 



evidence of wear from wave action. On the other 



sandy layers, most fragile specimens are quite 



of the sandy beds is quite in accordance with what 



within moderate range of a shore where there was a 



Delta belonging to a river like the La Plata or the 



Agassiz tells us that in some regions vast quantities 



getation are strewn over the sea bottom, even at 



fathoms, and at distances of several hundred miles 



len dredging off the coasts of Central America in 



lc and Pacific Oceans he frequently brought up not 



fruit, but even logs. In the present instance we 



depth nor distance from the shore to explain the 



the sea floor, at only moderate depth, the abode of 



