CKINOIPS AND BLASTOIDS. 159 



than to observe that the upper part of No. 3 of the Le Grand 

 and Indiantown section is, in our opinion, very probably the 

 representative in part of the Lower Burlington limestone. 

 Dr. White, indeed, notes this resemblance 'in his explanation of 

 the Indiantown section, on p. 196. In the upper layers we found 

 a specimen of Actinocrinux prohowidnliH which is one of the 

 most characteristic species of the Lower Burlington. 



By reference to Dr. White's admirable description of the beds 

 at Burlington, in 'the Boston Journal of Natural History, Vol. 

 VII, No. II, p. 21"), ft .s-fv/, published in 1860, it will be seen 

 that his bed No. 7 is divided into three portions, without, how- 

 eve?-, any definite line of separation. The lower portion is irregu- 

 lar in character, being partly magnesian limestone, in some 

 places somewhat silicious, in others tolerably pure limestone. 

 The middle portion is a rather pure limestone composed to a 

 great extent of the remains of Crinoids more or less solidly 

 cemented together. The upper portion consists of impure cherty 

 limestones and silicious shales. The division between the lower 

 and middle portions of this bed was taken as an imaginary line 

 between the true Devonian (as these Kinderhook beds were then 

 considered,) and the Carboniferous strata, indicating approxi- 

 mately the limits of the two systems. The middle portion is 

 what has since been known as the Lower Burlington limestone, 

 and the upper portion as the beds of passage into the Upper 

 Burlington. In other words, in practice, all beds below Dr. 

 White's imaginary line are Kinderhook, and all above it Bur- 

 lington. 



Comparing these features w r ith what we have observed at Le 

 Grand, we are inclined to think that the strata from the oolitic 

 bed up to the top of the brown and buff magnesian limestone, 

 represent the lower portion of White's No. 7, and that the thin- 

 bedded cherty limestone above is equivalent to the upper part 

 of that bed: the middle or crinoidal Lower Burlington being 

 feebly developed. This, if correct, would make the Le Grand 

 exposure Kinderhook, as far up as the top of the magnesian 

 limestone only. 



Very few Echinoderms have been found in the Kinderhook 

 elsewhere. In the paper above referred to, Dr. White gives a 



