Col, E, Jewett on the Catskill Grou]), 395 



head (as seen under the microscope) presents quite a different ap- 

 pearance, whilst the reproductive organs are differently disposed. 

 In those you sent me they are all on one side, but some of the 

 above-mentioned authorities state that their position is sometimes 

 reversed. This I suspect is an error. 

 Yours very truly, 



T. Spencer Cob bold. 

 Prof. George Lawson, LL.D. 



ARTICLE XXXNlll.— ColE. Jewett, of Albany, on the geolo- 

 gical age of the rocks of New York, heretofore referred to the 

 Old Red Sandstone. 



The following account of the important discovery made by 

 Col. Jewett is given in the Fifteenth Annual Report of the Regents 

 of the New York University.* 



"A few week since, an interesting collection of teeth and plates 

 of fishes, supposed to be from the Old Red Sandstone of Delaware 

 county, was received at the Geological Rooms. The Curator was 

 directed to visit the locality, for the purpose of enlarging the col- 

 lection. The following is his report. 



Albany, September 20, 1862. 

 Dr. Woolworth, Secretary of Regents, &c. 



Agreable to your directions, I went to Delaware county, to col- 

 lect fossils from the Catskill group, or Old Red Sandstone. 



At Franklin I found Mr. J. M. Way, a gentleman who for 

 years has been examining the rock and collecting the fossils ; and 

 although he is unacquainted with any other localities, and has 

 never seen a collection of fossils, he has succeeded in investigating 

 the whole strata of the neighborhood, and collecting many fossils. 

 With his assistance, I was able to make a section from the Oleout 

 creek to the top of a hill about three miles southwest of the vil- 



♦I received a letter from Col. Jewett in September last, containing 

 the results of his researches in the so-called Catskill group. It will be 

 observed by another paper published in this number that Prof. Hall in- 

 directly associates himself with the discovery ; but I am informed that 

 he did not visit the locality until after Col. Jewett had been there and 

 decided the question. — E. B. 



