Dates of the several Numbers of this Volume. 
Number XXXVI, pp. 1-82 forjMarch 1913. 
Number XX XVII, pp. 83-172 for November 1913. 
Number XXXVIII, pp. 173-228 for September 1914. 
Number XX XIX, pp. 229-292 for January I915. 
Number XL, pp. 293-356 for March 1915. 
Corrections. 
Plates I-X XVIII (with the corresponding references in the text) 
should be re-numbered CXI-CX XXVIII. 
Page 220, line 25, for 17-19 read 34-38. 
- We. 13/608—450—4/15—N. & Co., Ltd. Gp. 10. 
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