Bulletin 14 274 



the middle, where they form, as it were, a hump; others, again, 

 are depressed in the middle; but in most of them the outward 

 surface is remarkably elevated. The furrows always run longi- 

 tudinall}', or from the top, diverging to the margin. Petrified 

 Cornua ammonis. These are likewise frequent! 5^ found, but are 

 not equal to the former in number. Like the pecflinitse, they are 

 found really petrified and in impressions; amongst them were 

 some petrified snails. Some of these Cornua Ammonis were re- 

 markat^ly big, and I do not remember seeing their equals, for 

 they measured above two feet in diameter." 



"Different kinds of corals could be plainly seen in and sep- 

 arated from the stone in which they lay. Some were white and 

 ramose, or Lithopytes;* others were starry corals, or Madrepores. f 

 The latter were rather scarce." 



"I must give the name of stone-ballsj to a kind of stones, for- 

 eign to me, which are found in great plenty in some of the rock- 

 stones. They were globular, one-half of them proje(5ling gener- 

 ally above the rock and the other remaining in it. They consist 

 of nearly parallel fibres, which arise from the bottom as from a 

 center and spread over the surface of the ball and have a grey 

 color. The outside of the balls is smooth, but has a number of 

 small pores, which externally appear to be covered with a pale 

 grey crust. They are from an inch to an inch and a half in 

 diameter." 



The above is quoted so fully on account of its historic inter- 

 est, as showing the state of knowledge of paleontolog}^ in the 

 middle of the eighteenth century. 



Prof. Emmons speaks of the secftion in his final report of the 

 second distridt of New York (1842). Reconsiders the rocks at 

 the extreme end of Long Point to be Chazy underlying a thin 

 portion of Trenton, the Birdseye being wanting. In speaking of 

 the black limestone, he says: 



*Probably Prof. Kalm refers to the ramose form of Monticiilipora 

 lycoperdon. 



tPossibly ColuDinaria alveolata. 



JThis is a very good description, and the earliest, of the hemispheric 

 form of JMonticiUipora lycoperdon. 



