OLIGOCENE FOSSILS. 
413 
LIMN.Ein.E. 
Ancylus (?) lotus Edwards, 
Velletia elcgans (J. de C. Sow.), 
MEL.\N1ID.E. 
Melania acuta (J. Sow.), 
— V. excavata Morris, 
— V. tumescens Edwds. MS., 
contabulata Edwds. MS., 
nysti Nyst, 
3Ielanoj)sis carinata J. de C. Sow.. 
fusiforniis a . Sow., 
pscudo-siibulata Newton, 
subcarinata Morris, 
subnlata J. Sow. , 
Coptostylus brevis (J. de C. Sow.), 
PALUDESTEINin.E. 
Paludestrina anceps Edwards MS., 
dubuissoni (Boiiillet), 
injlata (St. Fond), 
peracuta Edwards MS., 
subangidata Edwards MS., 
Tomichia duchasteli (Ny.st), 
polita (Edwards), 
Pyrgida ditropis Edwards MS., 
pxdchra (Raincourt), 
— V. denticulata Edwds. MS. 
Bithyiiella pidchra (Desli.), 
Stenothxjra lubricclla (Braun), 
meaiana (Desliayes), 
parvida (Morri.s), 
pupa (Nyst), 
RISSOID.E. 
Potamaclis forbcsi (Morris), 
peracuminata (Morris), 
turritissima (Forbes), 
tcoodi Edwards MS. , 
VIVIPARID.E. 
Vivipara angulosa (J. Sow.), 
— V. orbicularis (Morris), 
distinguenda (Desliayes), 
globxdoides (Forbes), 
lenta (Solander), 
vestita Edwards MS., 
CYCLOPHORID.E. 
Dissostoma mumia (Lamarck), 
Cyclotus cinctus Edwards, 
7mdus Edwards, 
CYCLOPIIORID.E. 
Craspedopoma elizabcthm Edwards, 
Pomatias hctei-ostoiiia (Edwards), 
minuta Edwards MS., 
rotundata, Edwards MS., 
Callianella Uevis (Sandberger), 
DESPCENID.R. 
Despania woodwardi Edwards MS., 
NERITID.E. 
Nei'itina aperta, (J. de C. Sow.), 
— V. zonula S. V. 4Vood, 
concava J. Sow., 
forbcsi S. V. AVood, 
fuhninifera Sandberger, 
pUmxdata Sandberger, 
tx-istis Forbes, 
UNIONID.E. 
V nio gibbsi Morris, 
— V. headonensis S. V. Wood, 
solandi'i J. de C. Sow., 
tuincscrns S. V. Wood, 
vcctensis S.V. Wood, 
CORBICULID.E. 
Sphccriurn bristovii (Morris), 
tumidida (S. V. Wood). 
headonense Edwards MS., 
mox-risi Edwards MS., 
Corbicida cestuarinn (Edwards MS.), 
ai-exxaria (S. V. Wood), 
cyclad iforin is (Desliayes), 
depcrdita (Lamarck), 
gibbosxda (Morris), 
mactx'ceformis (Edwards MS.), 
obliqua (Desliayes), 
obovata (J. Sow.), 
obtusa (Morris), 
pisuxn (Desliayes), 
pxdchx'a (J. de C. Sow.), 
— V. wrighti (Morris), 
scmistrkda (Desliayes), 
— v.foi'tis (Edwards MS.), 
sxtbregxdaris (Edwards MS.), 
tcnera (S. V. Wood), 
tx'unsvcrsa, (Morris). 
DREIS.SENSIID.R. 
Dx-cisscxxsia bx'ardi (Brongniart). 
The Pliocene [-n-Xeiov, more; uaivos, recent) strata succeed the 
Oligocene in this country, as during the whole of the intervening 
Miocene period these islands were elevated above the sea, and prob- 
ably united with the continent, but at the beginning of the Pliocene 
era the south-eastern districts were again submerged, and those vari- 
ous sand-banks and shell deposits were accumulated which constitute 
the ‘Crag.’ 
The Yalvata antiqua of Sowerby and related forms are now removed 
from the list of extinct Pliocene and Pleistocene .species, as they are 
still found in this country in a living state. 
