about Lewes.—U. Abundant in the neighbourhood of Harting.— W. Common also in the vicinity of Brighton.—M.
Valvata cristata. The Crested Valve-shell.— In weedy ditches at Eastbourne, and in a pond at Old Dean Farm, Henfield, on the dead stalks of the weeds.—B.
Order Pulmonobranchiata.[1]
Fam. Limnæidæ.
Planorbis corneus. The Horny Coil-shell.—Abundant in stagnant ditches in the levels of the Arun, Adur, Ouze, and Cuckmere rivers.— B. In the ditches at Mailing, and very fine in ditches on Pevensey level.— U. Mr. W. Jeffery remarked it in great numbers in the mud thrown out of a "rithe" some years ago at Bersted.
Planorbis albus. The White Coil-shell.— Common in ponds on the clay, but not found in those of the sand or chalk.— B. Mr. W. Jeffery has found it in the stream at Ratham.
Planorbis glaber. The Smooth Coil-shell.—"I have only found this species in a small pond in my own grounds at Cowfold."— B.
Planorbis nautileus. The Nautilus Coil-shell.—At Ratham and Wisboro' Green.—J. Under the synonym imbricatus, Mr. Unwin includes this species in his list of Mollusca in the vicinity of Lewes. He describes it as "rare on Callitriche verna in a ditch near the Ouse." It is included, under the same name, in the Brighton list without any comment. Mr. Borrer names it Planorbis cristatus, and notes it as occurring in a shallow pond at Cowfold, and in some of the ditches in the level of the Adur at Henfield.
Planorbis carinatus. The Keeled Coil-shell.—Common in the levels of the Arun and the Adur, in weedy ditches and occasionally in ponds.
Planorbis complanatus, vel marginatus. The Flattened Coilshell.—Found in similar situations to the last-named, and much commoner. Occurs in all the ponds and water-courses about Halting.—W.
Planorbis vortex. The Whorled Coil-shell.—Common in stagnant weedy ponds.
- ↑ Having lung-like gills.
