880 J. D. Dana—Hudson River Age of the Taconic Schists. 
found that have been recognized as belonging to the Trenton 
limestone.”* The names of the species are not given. e 
Barnegat limestone is not far distant to the south and is the 
next adjoining stratum. The Poughkeepsie slates dip beneath 
the limestone, the dip being southeastward. But if the rocks 
are in folds and the limestone makes an anticlinal, it is an 
inferior bed notwithstanding the position.t In the Barnegat 
or Wappinger Valley limestone, which is a dark gray, semi- 
crystalline rock, Professor Mather found no distinct fossils. 
He states that his assistant, Professor C. Briggs, “in making 
his section from Poughkeepsie to Canaan in Connecticut, dis- 
covered faint traces of shells at a quarry a little south of 
Pleasant Valley on the bank of Wappinger’s Creek; but 
they were too imperfect for determination. They were sit- 
uated between the slaty layers, which have a dip to the 
south-southeast of 35° to 40°.” Mather quotes also Professor 
riggs as reporting that Mr. William Thorn of this place 
(Pleasant Valley) had informed him that “he had often seen 
shells in the lime rock, although they are rare.” 
rofessor Mather himself visited that quarry half a 
mile southwest of Pleasant Valley (about seven miles north- 
east of Poughkeepsie), he would not have left the fossiliferous 
character of the limestone in doubt, and inserted discrediting 
remarks in his Report. Besides, Logan’s unfortunate idea of the 
Quebee group extending over the region, and some other 
wrong geological inferences, would never have had birth. At 
a visit to the locality this spring, in order to ascertain the facts 
in the case (in which I was accompanied by Professor Wm. B. 
Dwight of Vassar College, Poughkeepsie) I found fossils abund- 
ant and distinct. Among them we observed at the time of our 
visit, remains of two or three species of Crinoids, Cyathophyl- 
lowd corals, Lepteena sericea, Orthis tricenaria, O. testudinaria, 
Orthoceras junceum,§ forms suggesting Strophomena alternata 
pebbles of a conglomerate layer, proved to be worn specimens 
of a Cheetetes ? with col 
inch in diameter. The snow was deep over the country (so 
as n 
since either “on foot” or “on wheels” would have been 
attended with some difficulty), and hence a full examination 
of the locality could not then be made. It cannot be, for the 
* Page 401. 
+ Professor Mather calls the Barnegat limestone Calciferous, apparently because 
he had proved a limestone bed above it—that above referred to—to contain 
Trenton fossils; he could have had no other reason for it, for he says that he had 
no fossils from it. 
3 Page 410. 
The form, size, and distance between the septa, are the same as in this species. 
