POSTGLACIAL BIOTA OF THE GREAT LAKES REGION 177 



Foraminifera. Nearly all the rare and deep sea shells of this locality occur in 



this band ! ft. 3 in. 



Sand and clay, a few shells of Astarte and Saxicava, and remains of sea weeds with 



Lepralia attached; also Foraminifera 2 " " 



Stony clay, boulder clay x " x " 



Depth of section 7 "8^in. 



The abundance and variety of the fauna found in these beds indicate an 

 extensive duration of marine conditions. At several localities, as at Mon- 

 treal and Logan's Creek, fresh water shells are mingled with the marine species, 

 showing that rivers and streams flowed into the sea, bringing down and deposit- 

 ing these fluviatile species. In the present connection, only those localities will 

 be considered that have produced a mixed fresh water and marine fauna. In 

 the Gulf of St. Lawrence, and on the Atlantic coast from Maine southward, a 

 great many postglacial deposits occur which contain an abundant and varied 

 marine fauna. 199 



199 See the following papers relating to this subject : 

 Amer. Nat., V, p. 125, 1871 (Ontario Co.). 



Bell, Can. Geol. Surv., Rep. 1879, pp. 1-37 C (p. 32 Hudson's Bay). 

 Bell Amer. Journ. Sci., (iv), V, pp. 219-228, 1896 (Hudson's Bay). 

 Bell, Geol. Surv. Can., Rep. Prog., pp. 1-31CC, 1879 (p. 11, Hudson's Bay). 

 Chalmers, Geol. Surv. Can., An. Rep., VII, 1894, M, 1896, pp. 36, 37, 112, 127, 128, 134 

 (New Brunswick, etc.). 



Clapp, Bull. Geol. Soc. Amer., XVIII, pp. 505-556, 1908 (New England) 



Dawson, Amer. Journ. Sci., (ii), XXV, pp. 275-277, 1858 (Montreal). 



Dawson, op. cit., XXV, pp. 200-202, 1883 (Ontario). 



Dodge, Amer. Journ. Sci., (iii), XLVH, pp. 100-104, 1894 (Massachusetts). 



Ells, Geol. Sun-. Can., Rep. 1879-1880, pp. 1-47D (New Brunswick). 



Ells, op. cit. No. 977, pp. 1-46, 1907 (Ontario and Quebec). 



Johnston, W. A., Geol. Surv. Can., Memoir 101, pp. 25-32, 1917 (Ottawa). 



Little, Bull. Geol. Soc. Amer., XXVIII, pp. 309-322, 1917 (Waterville, Maine). 



Low, Geol. Surv. Can., Report, 1890-1891, pp. 1-82 L, 1892 (Quebec). 



Low, op. cit., 1887, F, pp. 1-19 (p. 18, Hudson's Bay). 



Merrill, Ann. X. Y. Acad. Sci., Ill, pp. 341-364, 1886 (pp. 354-355, Long Id.) 



Packard, Amer. Journ. Sci., (ii), XLI, pp. 30-32, 1866 (Labrador). 



Perkins, Rept. State Geol. Vermont, VI, 1907-1908, pp. 76-112, 1908 (Vermont). 



Reis, Bull. N. Y. State Mus., No. 12, 1895, pp. 93-262 (p. 103 New York). 



Sherman, Amer. Nat., VII, pp. 373-374, 1873 (Maine). 



Shimer, Post-Glacial History of Boston, Amer. Journ. Sci., (iv) XL, pp. 437-442, 1915. 



Stansfield, J., Geol. Surv. Can., Memoir 73, pp. 65-68, 1915 (Montreal). 



Thompson, Amer. Journ. Sci., (ii), IX, p. 262-263, 1850 (Vermont). 



Upharn, Amer. Journ. Sci., (iii), XXXVII, pp. 359-372, 1889 (Massachusetts). 



Upham, op. cit., pp. 100-104 (Massachusetts). 



Whiteaves, Ottawa Nat., XX, pp. 214-216, 1907 (Parkenham, Ont.). 



