B.— TABLE OE THE CLASSIFICATION OF THE LOWER 
BEITAIN. 
Ludlow 
Series. 
Wenlock 
Series. 
May Hill 
Series. 
/^Ledbury Shales. 
I Downton Sandstone. J 
] (Passage 
Beds.) 
1 Aymestry Limestone. 
( Lower Ludlow Beds. 
1 O 
J P 
( Wenlock Limestone. 
\ Wenlock Shale. 
1 f-H ^ 
a GQ 
[ Woolhope Beds. 
('Tarannon Shales. 
1 .3 
•{ Upper Llandovery. 
( Lower Llandovery. 
i-ll 
Us- 
^ J 
/^Hirnant Limestone and Asbgill 
Shales. 
Bala Series. •( Oaradoc Beds and Coniston Limestone. 
Llandeilo Flags. 
f 
Llanvirn 
Series. 
Arenig 
Series. 
Upper. — Did^}nog7'aptusSha\es. 
I Lower. — Flags and Slates with Placo- 
( paria, &c. 
" Upper. — Grarth Grrit. 
Lower. — Garth Slates. 
'' Tremadoc / Upper. — With Asaphelhts Hornfrayi, &c. 
Series. \ Lower. — J)ictyonema-Pi%d^. 
T- . 1 f Dolgelly Beds. 
Lingula pf33^tiniog Beds ^ 
ag eiies. | ]viaentwrog Beds. 
5 i 
Menevian 
Series. 
Harlech 
and 
Longmynd 
Series. 
Longmynd Beds. 
Caerfai and Solva Beds. 
Llanberis Grits and Slates. 
Harlech Grits. 
SCANDINAVIA. 
Sandstones of Kamsosa and 
Kaerrstorp. 
Gothland Sandstone. 
Cardiola Beds, Leptaena Lime- 
Oyrtograptus Shales. [stone 
Eastrites Shales. 
Brachiopod Beds (Upper). 
Brachiopod Beds (Lower). 
, Trinucleus Shales. 
Chasmops Limestone. 
I Middle Graptolite Shales. 
Murchisoni-Shales of Scania. 
I Orthoceras-Limestone (in part), 
'Upper. — Sandstones and Shales, with 
OrtMs Hicksii, &c. 
Middle. — Black Flags, vdth Paradoxides 
Pavidis, &c. 
Lower. — Grey Flags, with Paradoxides 
HicJcsii, &c. 
Orthoceras-Limestone (in part) 
Phyllograptus-Shales. 
Ceratopyge Beds. 
Olenus-Schists. 
Paradoxides-Schists. 
Eopbyton and Fucoid Sand- 
[stones, 
’ Dr. Schmidt (Quart. Journ. Geol. Soc. vol. xxxviii. 1882, p. 528) says that this stage is 
doubtless a representative of the typical Wenlock Limestone of England, and of the Niagara 
Lmu-.‘«ton<' of Noi tli America. 
" Of ibis zone Dr. Schmidt (Joe. cit. p. 523) observes that the general character of its fauna ^ 
is comparable with that of the Bala group of England, and the Trenton of North America. 
Professor Lapworth has recently recorded (Geol. Mag. n. s. decade iii. 1888, vol. v. p. 484) 
the discovery of the “ Olenellus Fauna” of Scandinavia, Esthonia, and Lapland in the Lower 
