The publication of the present report has been much delayed, first, 

 by the removal of the Museum and Offices of the Survey from Montreal 

 to Ottawa in 1881, next by the death of Mr, J. H. Balbirnie, who was 

 to have lithographed the plates, in the sjDring of 1883, and lastly, by 

 the resignation of the artist, Mr. A. H. Foord, which practically took 

 place on the first of June, 1883. 



-Most of the text has been written and four of the plates have been 

 printed off' more than twelve months ago. 



Plate 33 will be issued with Part 4, which is now in course of pre- 

 paration, and which will complete the volume. 



ALFEED R. C. SELWT^. 



{jteological and Natural History Survey Office, 

 Ottawa, March 25th, 1884. 



