1899.] NATURAL SCIENCES OF PHILADELPHIA, 511 



lu closing, ackuowledgmeut is particularly clue for the thought- 

 ful cooperation and interest of Mr. E. J. Duchesnay, Division 

 Superintendent of the Canadian Pacific Railway, Eevelstoke, B. C, 

 and of his assistant, Mr. C. E. Cartvvright, for valuable assist- 

 ance in connection with the surveys. Also to Edouard Feuz, of 

 Interlaken, whose untiring interest, and skill on ice and rock, 

 contributed largely to the success of the results. 



