MOLLTJSCA OBSERVED IN HERTS. 
289 
Vitrea lucida (Drap.). Mr. Bullen lias specimens taken in 
a greenhouse at Hemel Hempstead in 1908, but there is no 
evidence that this species is indigenous to Hertfordshire. 
V. radiatula (Alder).—Prse Wood, St. Albans. 
Huconulus fulvus (Miill.).—Abundant and fine among rushes 
in the Colne Valley at Park Street. This species is generally 
distributed and plentiful in beech woods in the west of the 
county. 
Avion ater (Linn.), var. albolateralis Roeb.—Croxley. 
Punctum pygmseum (Drap.).—Beech Bottom, near St. Albans 
{Bullen). 
Sphyradium edentulum (Drap.).—Aldbury Owers, near Tring. 
Pyramidula rotundata (Miill.), var. rufula (Moq.).—St. Albans 
{Bullen). 
Helicella virgata (Da Costa), var. albicans (Grat.).—Tring and 
Aldbury. Var. lutescens (Moq.).—Occurs with the type in many 
places in the neighbourhood of Tring. 
H. itala (Linn.).—Aldbury Owers, near Tring. 
Hygromia granulata (Alder).—Startop’s End Reservoir, Tring. 
H. hispida. (Linn.), var. albida Jeff.—St. Albans {Bullen). 
Acanthinula aculeata (Miill.).—Aldbury Owers, near Tring. 
Vallonia costata (Miill.).—Bulbourne, near Tring; Frithsden; 
Sop well Ruins, St. Albans ; Aldenliam Churchyard. 
V. excentrica Sterki.—Aldbury. 
Helicigona lapicida (Linn.).—Hastoe Hill, Tring. 
H. arbustorum (Linn.).—Abundant in a nettle-bed at Croxley 
with var. fuscescens (D. & M.), var. cincta Taylor, and var. 
flavescens (Moq.). Var. fuscescens. —Park Street. 
Helix pomatia Linn.—In part 17 of his ‘Monograph of the 
Land and Freshwater Mollusca of the British Isles ’ Mr. J. W. 
Taylor refers to a specimen of the var. albida Moq. collected 
at Puckeridge by Mr. E. H. Rowe in 1882, and figures var. 
brunnea Moq., var. vadiata Ulicny, var. acuminata Baudon, 
and var. inflata Hartm., collected at Gallows Hill, Hertford, by 
Mr. A. G. Stubbs. 
H. hortensis Miill., var. incarnata (Moq.), var. lutea Moq., 
and var. lilacina Taylor, with the type.—Loates Lane, Watford. 
Azeca tridens (Pult.).—Aldbury Owers, near Tring; St. Albans 
{Bullen). Var. crystallina Dup.—Abundant, with the type, in 
a lane on the Herts-Bucks border near Tring. 
Jaminia muscorum (Linn.). — Aldbury ; rejectamenta at 
Wilstone Reservoir. 
Vertigo pygmaea (Drap.).—Aldbury. 
Ancylus fluviatilis Miill.—On shells of Anodonta in the canal 
near Tring; watercress-beds, Munden, near Watford. 
Acroloxus lacustris (Linn.).—Pond, Leverstock Green {Bullen). 
Limnaea truncatula (Miill.).—Colney Street, near St. Albans. 
Planorbis contortus (Linn.).—Very fine specimens in the Colne, 
Bushey Hall Farm, Watford. 
P. fontanus (Lightfoot).—Hastoe, near Tring. 
