( viii ) 
Dates of publication of the several parts contained in this volume 
Part 1. Pages 1-96 
„ 2. ,, 97-208 . 
,, 3. ,, 209-254 . 
,, 4. ,, i-lxxvi, and 255-310 
September, 1909. 
January, 1911. 
June, 1911. 
July, 1912. 
Dates of publication of previous volumes : 
Transactions of the "Watford Natural History Society. 
Yol. I. (pp. lxiv and 248.) . . . . August, 1878. 
,, II. (pp. lx and 260.) .... June, 1880. 
Transactions of the Hertfordshire Natural History Society. 
Yol. I. 
(pp. lxviii and 272.) 
May, 1882. 
,, II. 
(pp. lxviii and 286.) 
May, 1884. 
,, III. 
(pp. lxxii and 274.) 
March, 1886. 
IY. 
(pp. lii and 224.) . 
June, 1888. 
Y. 
(pp. xlviii and 224.) 
May, 1890. 
YI. 
(pp. lxx and 204.) . 
July, 1892. 
,, VII. 
(pp. lii and 244.) . 
April, 1894. 
„ VIII. 
(pp. lxxii and 212.) 
November, 1896. 
„ IX. 
(pp. lxxviii and 252.) 
August, 1898. 
,, X. 
(pp. lxxvi and 248.) 
July, 1901. 
,, XI. 
(pp. xliv and 252.) . 
November, 1903. 
„ XII. 
(pp. lxxii and 264.) 
October, 1906. 
,, XIII. 
(pp. lx and 284.) 
September, 1908. 
