NORTH AMERICAN PALAEONTOLOGY. 243 



Dana, James D. Lower Siluriau Fossils in a liuiestone of Emmons's 

 original Tacouic. Abstract. (Proc. A. A. A. S., vol. xxxiv, pt. 1, 

 pp. 21G, 217, 1S8G. Salem.) 



Mentions the discovery of Lower Silurian fossils iit several points in the "Sparry 

 Limestone" of Emmons, in the town of Canaan, Columbia County, New 

 York. 



Dana, James D. On Lower Silurian Fossils from a limestone of tbe 

 original Taconic of Emmons. (Amer. Jonr. Sci., 3d ser., vol. xxxt, 

 pp. 241-248, April, 188G. ^ew Haven.) 



The same Taconic limestone belt that contains Trenton and Chazy fossils in 

 Rutland, Vermont, and towns farther north, as shown by the Vermont Geo- 

 logical Survey, is now proved to have Lower Silurian fossils west of the 

 Taconic range at Canaan, in eastern New York. 



Dana, James D. On Lower Silurian fossils from a limestone of tbe 

 original Taconic of Professor Emmons. (Nature, vol. xxxiv, p. 6S, 

 188G. London and Xew York.) 



Notice of. See Auicr. Jour. Sci., April, 1886. 



Dana, James D. The Taconic stratigraphy and fossils. Note. (Amer. 

 Jonr. Sci., 3d ser., vol. xxxii, pp. 23G-239, September, 188G. New 

 Haveu.) 



Fossils arc not to be looked for in a coar.se mica schist or gneiss, or in coarsely 

 crystalliue limestone. With even the metamorphic change producing a 

 hydromica schist, the disappearance of fossils is to be exj)ected, though not 

 always a fact; and that producing a coarse mica schist necessarily exter- 

 minates fossils. In conclusion, the author believes we may safely regard 

 the Canaan fossils as proof that the limestones and schists of the Taconic 

 system (sic) are not older than the Potsdam sandstone. 



Dana, James D. {See Hinde, George J.) 



Darton, Nelson n. The Taconic Controversy in a Nut-shell. 

 (Science, vol. vii, No. 155, pp. 78, 79, January, 18SG. New York.) 



States that in his paper entitled " On the occurrence of fossils in the Hudson 

 River slates in Orange County, New York, and elsewhere," he employed 

 the words " Fossils in the Hudson River slates," etc., rather than " Tren- 

 ton fossils in the Taconian argillite." 



Darton, Nelson n. Preliminary notice of fossils in the Hudson Eiver 

 slates of the southern part of Orange County, New York, and else- 

 where. (Nature, vol. xxxiii, p. 285, 188G. Loudon and New York.) 

 Notice of paper. See American Journal of Science for December, 1885. 



Darton, Nelson H. On the Area of Upper Silurian rocks near Corn- 

 wall Station, eastern-central Orange County, New York. (Amer. 

 Jour. Sci., 3d ser.. Vol. xxxi, pp. 209-21G, March, 188G. New Haven.) 



Describes an area of Lower Helderberg limestone and gives lists of fossils found 

 and notes concerning them. 



Darton, Nelson H. Uu the area of Upper Silurian rocks near Corn- 

 wall Station, eastern-central Orange County, New York. (Nature, 

 vol. XXXIV, p. 46, 188G. London and New York.) 



Notice of. See American Journal of Science, March. 



