THE MOLLUSCA OF KENT, SURREY AND MIDDLESEX. 91 
with red. On the 23rd I took four eggs of the Peregrine, 
measuring 2°21 by 1°65 in., 2°17 by 1°72 in., 2°17 by 1°74 in., 
and 2°1 by 1°72 in.; while two addled eggs of former years in 
the same eyrie measured 2°14 by 1°69 in. and 2°12 by 1°69 in. 
THE MOLLUSCA OF THE COUNTIES OF KENT, SURREY 
AND MIDDLESEX. 
By T. D. A. CockErEtLu. 
I wave been surprised to find that there is no list in 
existence of the Kentish shells, that Surrey has never been 
properly worked out, and that even Middlesex might be explored 
with benefit, nearly every walk producing something new.* 
I therefore commenced collecting notes on the subject, with a 
view of publishing a list of which I had myself felt the want, 
and which I thought, however incomplete, would be better than 
none. Having accumulated a fair amount of material for the © 
purpose, I have drawn up the following list, which, however, 
I do not pretend to call complete; indeed it is partly with a 
view to obtain addenda that it has been written. I have not 
dealt largely with the question of variation in the present 
paper, but have confined myself principally to the named forms. 
I may, however, remark that many varieties of great interest 
for which I have not found names have been met with in the 
district. To ensure greater accuracy, most of the species of 
Pisidiuwm, Odostomia, Rissoa, &c., were submitted to the late Dr. 
** The following local lists have been published for these counties :— 
Kent.—Smith, ‘‘ Mollusca of puevendafd,” Zool. vol. xii. p. 4832, and 
Benson, Ann. Mag. Nat. Hist. 1856, p. 74; R. H. Smith, ‘‘ List of Mollusca 
of Sevenoaks and Faversham,” in Cassell’s ‘ Floral Guide to East Kent,’ 
p. 63 (1839) ; Leslie, ‘‘ Mollusca of Erith,” Quarterly Journ. Conchol. vol. i. 
p. 33. 
Surrey.—Cooper, ‘‘Shells at Mickleham,” Mag. Zool. & Bot. vol. ii. 
p- 471; Saunders, ‘ Mollusca of Reigate,’ 2nd ed. 1864. 
Mippiesex, Lonpon anp Environs.— Cooper, Appendix to ‘Flora 
Metropolitana,’ 1836, pp. 120—127; Sheppard, ‘‘ Mollusca of Fulham,” 
Zool. vol. ix. p. 8120; Gray, Ann. Mag. Nat. Hist. 1856, p. 465; and 
Harting, ‘Rambles in Search of Shells,’ published by Van Voorst, post 8vo, 
pp- 110 (1875).—Ep. 
