"Avicula contorta Beds".
_Aviculidoe_.
_Aviculopecten_.
_Axophyllum_.
Aymestry Limestone.
Azoic rocks.
_Baculites; anceps_.
Bagshot and Bracklesham Beds.
_Bakewellia_.
_Baloena_.
Bala Group.
Bala Limestone.
_Balanidoe_.
_Banksia_.
Barbadoes Earth.
Barnacles.
Bath Oolite.
Bats.
Bears.
Beaver.
Beetles.
_Belemnitella mucronata_.
_Beleminites; canaliculatus_.
_Belemnitidoe_.
_Belemnoteuthis_.
_Belinurus_.
_Bellerophon; Argo_.
_Belodon; Carolinensis_.
_Belosepia_.
_Beloteuthis subcostata_.
Bembridge Beds.
_Beryx; Lewesiensis_.
_Beyrichia; complicata_.
Bird's-eye Limestone.
Birds, of the Trias; of the Jurassic; of the Cretaceous; of
the Eocene; of the Post-Pliocene.
_Bison priscus_.
Bituminous Schists of Caithness.
Bivalves (_see_ Lamellibranchiata).
Black-lead (_see_ Graphite).
Black-River Limestone.
_Blastoidea_; of the Devonian; of the Carboniferous.
_Boidoe_.
Bolderberg Beds.
Bone-bed, of the Upper Ludlow; of the Trias.
Bony Fishes (_see_ Teleostean Fishes).
_Bos primigenius; _taurus_.
Boulder-clay.
_Bourgueticrinus_.
Bovey-Tracy Beds.
_Brachiopoda_; of the Cambrian rocks; of the Lower Silurian;
of the Upper Silurian; of the Devonian; of the Carboniferous;
of the Permian; of the Trias; of the Jurassic; of the
Cretaceous; of the Eocene.
_Brachymetopus_.
Brachyurous Crustaceans.
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