walcott.) PALEONTOLOGY — ADIRONDACK. 229 



MISSOURI. 



Tbe only description of a fossil referred to the Cambrian of Missouri 

 is that of Lingulella lamborni by Meek. 1 



EASTERN BORDER OR ADIRONDACK SUB PROVINCE. 



The first notice of auything of an organic nature in the strata now 

 referred to the Potsdam or Upper Cambrian zone, about the Adiron- 

 dacks, was by Mr. J. H. Steele in 1825, who described certain large cal- 

 careous concretions. 2 These were subsequently described in detail by 

 Prof. J. Hall and named Cryptozoon proliferum? 



The second notice is by Dr. E. Emmons, who states that near Keese- 

 ville, in the bottom of the fissure at the high bridge, he found numerous 

 specimens of small bivalve mollusca, a lingula. 4 



Lingida acuminata was described by Mr. T. A. Conrad as occurring 

 in the Calciferous saudrock, and in the table of classification he places 

 it as occurring in the gray Calcareous sandstone at the base of the 

 Lower Silurian above the Cambrian system. 5 It is now known to occur 

 in abundance in association with Dikelocephalus and Upper Cambrian 

 fossils in a calcareous saudrock and limestone, both at Whitehall and 

 in Saratoga County, and in the Potsdam sandstone on Marble River, 

 Franklin County, New York. 



In his description of the Potsdam sandstone at Au Sable Chasm, Jef- 

 ferson County, New York, Dr. Emmons figures aud names Lingula 

 antiqua. 6 The same woodcut is used by Prof. Hall to illustrate Lingula 

 acuminata of Conrad. 7 



In volume I of the Paleontology of New York, Prof. J. Hall defines 

 tlie genus Scolithus of Haldeman (p. 2), and describes S. linearis 

 Haldeman (p. 2) ; Lingula prima of Conrad is described and illustrated ; 

 and Lingida antiqua is proposed as anew species for the specimen fig- 

 ured by Emmons as Lingida antiqua (p. 3). These species are illustrated 

 on Plate i. 8 



Attention was called to the presence of a track and footprint of an 

 animal in the Potsdam sandstone of Lower Canada by Sir W. E. Logan 



1 Notice of a new brachiopod from the lead-bearing rocks at Mine la Motte, Missouri. Phila. Acad. 

 Nat. Sci., Proc, vol. 23, 1871, p. 185. 



2 A description of the Oolitic formation lately discovered in the county of Saratoga, and State of New 

 York. Am. Jour. Sci., vol. 9, 1825, pp. 16-19. 



3 Cryptozoon, n. gen., Cryptozoon proliferura, n. sp. Description of PI. vi. 36th Ann. Rep. State 

 Mus. Nat. Hist., 1884. 



4 Report of the geologist of the 2d geological district of New York. Second annual report of the 

 Geological Survey of N. Y. Albany, 1838, p. 230. 



'Second annual report of the palcontological department of the survey, Third annual report of 

 the Geological Survey of New York. Albany, 1839, pp. 63, 64. 



6 Geology of New York, Part 2, comprising the survey of the 2d geological (northern) district. 

 1842. p. 2C8, fig. 68. 



'Geological survey of New York; it? influence on the productive pursuits of the community. N. 

 Y. State Agric. Soc. Trans., for 1843, 1844, p. 252. 



8 Paleontology of New York, vol. 1, containing descriptions of the organic remains of the lower 

 division of the New York System. Albany, 1847. 



