302 ON THE ZONAL STRATIFICATION OF THE
Littorina rudis Lepton nitidum
„ littorea Lutraria oblonga
Nassa pusillina Mactra ovalis
Natica alderi „ truncata
Neptunea antiqua „ subtruncata
Pleurotoma (Bela) pyramidalis Mya arenaria
„ turricula Mytilus edulis
Purpura lapillus Nuculana buccata
Rissoa striata Nucula cobboldiae
Scalar i.a trevelyana ,, nucleus
Ringicula ventricosa ,, tenuis
Turritella terebra Saxicava rugosa
incrassata Scrobicularia piperata
Utriculus truncatulus Syndesmya alba
Tellina fabula
,, obliqua
„ praetenuis
Mr. H. B. Woodward suggests the term Icenian should cover
the whole series of deposits from the Norwich Crag to the Wey-
bourn beds inclusive. Mr. Harmer now regards these Tellina
balthica beds as an Upper zone of the Norwich series ; personally
my opinion is they might be considered as the beginning of the
Pleistocene formations.
I have, it may be noticed, said little about the constituents
of the Crags or their contents, except incidentally, but have
mainly kept myself to new matter such as the manner in which
the material and faunas were introduced into the Crag regions,
the land surfaces with its worked flints, the box stones, the
proposed Boytonian zone, and the incoming of the northern
fauna.
LIST OF FOSSILS FROM THE BOYTONIAN ZONE.
FISH.
Anarrhichas lupus. Gadus pseud, aeglifinus.
Chrysophris sp. Notidanus primigenius.
Gadus luscus. Raia antiqua.
GASTEROPODA.
Amaura hesterna. Caecum mamillatum.
Aporrhais pes-pelicani. Calyptraea chinensis.
Brocchia sinuosa. Cancellaria Bellardi.
Buccinopsis dalei. „ contorta.
Buccinum undatum. „ coronata.
„ var. declive. „ serrata.
„ cf. inexhaustum. Sect. (Admete).
„ var. tenerum. A. subangulosa.