184 PROCEEDINGS: BOSTON SOCIETY NATURAL HISTORY. 
LITERATURE. 
Burr, H. T. 
1900. A new Lower Cambrian fauna from Eastern Massachusetts. Amer. 
geol., vol. 25, pp. 41-50. 
Crosby, W. 0. 
’89. Physical history of the Boston basin. Boston, 1889, pp. 5, 6. 
Foerste, A. F. 
’89. Palaeontological horizon of the limestone at Nahant. Proc. Boston soc. 
nat. hist., vol. 24, pp. 261-263. 
Grabau, A. W. 
’98. Guide to localities illustrating the geology, marine zoology and botany 
of the vicinity of Boston. Boston, 1898. (Refers to discovery by Prof. 
W. 0. Crosby.) 
Rogers, W. B. 
’56. Notes on Paradoxides from Braintree. Proc. Boston soc. nat. hist., 
vol. 6, pp. 27-29, 40-44. 
Wadsworth, M. E. 
’83. On the relation of the Quincy granite to the Primordial argillite of 
Braintree, Massachusetts. Proc. Boston soc. nat. hist., vol. 21, pp. 274-277. 
Walcott, C. D. 
’91. Correlation papers.— Cambrian. Bull. 81, U. S. geol. surv., p. 268, 
map, p. 358. 
Woodworth, J. B. 
’96. On the fracture system of joints. Proc. Boston soc. nat. hist., vol. 27, 
pp. 163-183. 
Printed, April, 1900. 
