MANSFIELD: ROXBURY CONGLOMERATE. 269 
Shrubsole, O. A. 
On the probable source of some of the pebbles of the Triassic pebble-beds 
of South Devon and of the Midland Counties. Quart. Journ. Geol. Soc., 
1903, vol. 59, p. 3117331. 
Smith, A. DeW. 
See Lesley, J. P., d’Invilliers, E. V. and Smith, A. DeW. 
Sollas, W. J. 
The estuaries of the Severn and its tributaries; an inquiry into the nature 
and origin of their tidal sediment and alluvial flats. Quart. Journ. Geol. 
Soc., 1883, vol. 39, p. 611-625. 
Stevenson, J. J. 
Carboniferous of the Appalachian Basin. Bull. Geol. Soc. Amer.,. 1904, 
vol. 15, p. 37-210. 
Stone, G. H. 
The glacial gravels of Maine and their associated deposits. U.S. G. S., 
Monograph 34, 1899. 
Strahan, A. 
On glacial phenomena of Palaeozoic age in the Varanger Fiord. Quart. 
Journ. Geol. Soc., 1897, vol. 53, p. 137-146, pl. 8-10. 
Stur, D. 
Ueber die in Flótzen reiner Steinkohle enthaltenen Stein-Rundmassen und 
Torf-Sphärosiderite. Jahrb. K. K. geol. reichsanst., 1885, vol. 35, p. 
613-648, pl. 10, 11. 
Tietze, E. 
Ueber einige Bildungen der jüngeren Epochen in Nord-Persien. Jahrb. 
K. K. geol. reichsanst., 1881, vol. 31, p. 67-130. 
Tilton, J. L. 
On the southwestern part of the Boston Basin. Proc. Bost. Soc. Nat. 
Hist., 1895, vol. 26, p. 500-505. 
Wadsworth, M. E. 
a. Notes on the mineralogy and petrography of Boston and vicinity. 
Proc. Bost. Soc. Nat. Hist., 1877, vol. 19, p. 217-237. 
b. On the relation of the Quincy granite to’ the primordial argillite of 
Braintree, Massachusetts. Proc. Bost. Soc. Nat. Hist., 1882, vol. 21, 
p. 274-277. 
c. The argillite and conglomerate of the Boston Basin. Proc. Bost. Soc. 
Nat. Hist., 1883, vol. 22, p. 130-133. 
d. On the relations of the so-called felsite to the conglomerate on Central 
Avenue, Milton, Mass. Harvard univ. bull., 1882, vol. 2, p. 431-432. 
Walcott, €. D. 
a. Correlation papers. Cambrian. ` U. S. G. 8., Bull. 81, 1891. 
