HERTFORDSHIRE MOLLTTSCA. 
11 
1836. 
Cooper (Daniel). Mora Metropolitana . . . with a list of the 
Land and Presh-water Shells of the Environs of London, p. 126. 
—Limneus auricularis — Limncea auricularia ; L. Scaturiginum— 
? L. stagnalis, junior; L. fossarius = Limncea truncatula. p. 127. 
—Paludina vivipara—P. contecta ; P. achatina—P. vivipara; 
Neritina fluviatilis ; Ancylus lacustris. 
1847. 
Pickering (J.). Description of a remarkable species or variety 
of British Paludina: Zoologist, Yol. v, p. 1786. —Paludina 
achatina, var. efasciata, Pick.=P. vivipara, var. unicolor, Jeff. 
1853. 
Porbes and Hanley. History of British Mollusca, and their 
Shells. Yol. ii, p. 161. — Anodonta cygnea. Yol. iii, p. 10. — 
Paludina listeri , P. and H., by error for P. vivipara, var. efasciata. 
Yol. iv, p. 136. —Succinea putris and var. gracilis—S. putris and 
S. elegans. 
1862. 
Jeffreys (J. Gwyn). British Conchology. Yol. I, Land and 
Preshwater Shells, p. 48.— Lreissena polymorpha. p. 58.— Palu¬ 
dina vivipara, var. unicolor —y ar. efasciata, Pick. p. 177. —Helix 
pomatia. p. 189. — H. arbustorum, var. alpestris. p. 298. — Achatina 
acicula. 
1866. 
Tate (Balph). Land and Presh-water Mollusks of Great Britain, 
p. 135. — Helix pomatia. p. 192. —Limncea stagnalis, var. fragilis. 
1873. 
Ashford (C.). Zonites glaher (Studer): Science Gossip, vol. ix, 
June, 1873. p. 137. — Zonites glaber, Z. cellarius, Z. alliarius , 
and Z. nitidulus. 
1875. 
Hartihg (J. E.). Bambles in search of Shells, Land and Presh¬ 
water. p. 29. —Zonites glaber. 
1876. 
Lavis (H. J. J.). [List of Mollusca collected in Berry "Wood, 
near Aldenham, May 1st, 1875]: Trans. Watford Nat. Hist. Soc., 
vol. i, part 4, June, 1876. p. xvii. —Planorbis carinatus, P. corneus, 
Physa fontinalis, Limncea peregra, L. stagnalis, Zonites glaber , Z. 
radiatulus, Helix aspersa , H. nemoralis, H. Cantiana Clausilia , 
sp., Cochlicopa, sp. 
1877. 
Pordhait (H. G.). Supposed recent extinction of Cyclostoma 
elegans in North Herts : Trans. Watford Nat. Hist. Soc., vol. i, 
part 7, July, 1877. p. 172. — Cyclostoma elegans. 
Jeffreys (J. G.). Helix villosa, Drap., new to Britain: Ann. 
and Mag. Nat. Hist., Ser. 4, vol. xix, Peb. 1877. pp. 199-200. 
—Helix arbustorum, var. alpestris. Record repeated in Journal of 
Conchology, vol. ii, p. 298, Oct. 1879. 
