Dates of publication of the several parts contained in this volume 
Part 1. Pages 1-46 . July, 1884. 
,, 2. ,, 47-94 .. . September, 1884. 
,, 3. ,, 95-142 . December, 1884. 
,, 4. ,, ix-xlviii . . . February, 1885. 
,, 5. ,, 143-190 . . June, 1885. 
,, 6. ,, 191-238 . September, 1885. 
,, 7. ,, 239-266 . December, 1885. 
,, 8. ,, xlix-lxxii. February, 1886. 
,, 9. ,, i-viii, and 267-274 . March, 1886. 
Dates of publication of previous volumes : 
Transactions of the Watford Natural History Society. 
Yol. I. (pp. Ixiv and 248). . August, 1878. 
Yol. II. (pp. lx and 260). . June, 1880. 
Transactions of the Hertfordshire Natural History Society. 
Yol. I. (pp. lxviii and 272) .. May, 1882. 
Yol. II. (pp. lxviii and 286) . May, 1884. 
