Dates of publication of the several parts contained in this volume ; 



Dates of completion of previous volumes : 



Transactions of the "Watford Natural History Society. 

 Vol. I. (pp. Ixiv and 248) August, 1878. 



II. (pp. Ix and 260) 



June, 1880. 



Transactions of the Hertfordshire Natural History Society. 



Vol. I. (pp. Ixviii and 272) 



II. (pp. Ixviii and 286) 



III. (pp. Ixxii and 274) 



IV. (pp. lii and 224) 



V. (pp. xlviii and 224) 



VI. (pp. Ixx and 204) 



May, 1882. 

 May, 1884. 

 March, 1886. 

 June, 1888. 

 May, 1890. 

 July, 1892. 



