Dates of publication of the several parts contained in this volume 
Part 1. Pages 1-32 . . August, 1888. 
„ 2. „ 33-64 . October, 1888. 
,, 3. ,, 65-96 .. . December, 1888. 
,, 4. ,, 97-128 . April, 1889. 
,, 5. „ 129-160 . June, 1889. 
,, 6. „ 161-192 . October, 1889. 
,, 7. ,, 193-216 . December, 1889. 
,, 8. ,, ix-xlviii . ..... April, 1890. 
,, 9. ,, i-viii, and 217-224. May, 1890. 
Dates of completion of previous volumes: 
Transactions op 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. Ixviii and 272) .... . May, 1882. 
„ II. (pp. Ixviii and 286) . May, .1884. 
„ III. (pp. lxxii and 274) . March, 1886. 
,, IY. (pp. lii and 232) ._ . June, 1888. 
