344 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Feb. 23, 
(2) Dark-coloured clays with Ammonites Martini, Am. Deshayesi, Crioceras, 
&e. (‘‘Zone of Ammonites Martini.” Von Strombeck.) 
(3) Dark-blue clays with septaria but with few or no fossils. 
The Middle Neocomian appears to be represented in Brunswick 
by the following strata :— 
(4) Dark-blue very tenacious clay full of fossils (‘Speeton-Thon,” “ zone 
of Belemnites brunswicensis,’ of Von Strombeck)*. It contains the fol- 
lowing :— 
Belemnites brunswicensis, VonStromb. | Panopza plicata, Sow. 
Ammonites Nisus, D’ Ord. neocomiensis, Leym. 
Pecten cinctus, Sow. Pinna gracilis, Phil. 
Thracia Phillipsi, Rom. Terebratula Moutoniana, D’ Orb. 
Avicula Cornueliana, D’Orb. (A. ma- | Serpula Phillipsi, Rém. 
croptera, Hom.). Meyeria ornata, Phil. sp. 
(5) Dark-blue clays abounding with Ancyloceras (“zone of Crioceras Emme- 
rict” of Von Strombeck). This bed contains the following :— 
Ancyloceras Emmerici, Lév. Lima longa, Rom. 
semicinctus? Rom. Terebratula Moutoniana, D’ Orb. 
Belemnites brunswicensis, Von Stromb. | Rhynchonella antidichotoma, D’ Orb. 
Serpula Phillipsi, Rom. 
(6) Unfossiliferous clays. 
(7) Beds of clay full of Hxogyra sinuata, Sow. (‘zone of OstreaCouloni, var. 
aquila”’ of Von Strombeck). 
(8) Unfossiliferous clays. 
The total thickness of these clays, representing the Upper and 
Middle Neocomian, is, in places, according to M. von Strombeck, 
upwards of 400 feet. 
The Lower Neocomian is represented by beds of limestone and 
sandy marl, containing in places many nodules of iron-ore. The 
uppermost of these beds abound with specimens of the highly cha- 
racteristic Toxaster complanatus, Ag. The whole series, which 
never exceeds 50 feet in thickness, is crowded with fossils, among 
the most characteristic of which appear to be the Echinoderms, no 
fewer than 10 species being cited by M. von Strombeck as common 
to and equally characteristic of these beds and the “ Marnes d’ Haute- 
rive” &¢. (Lower Neocomian) of the Jura. 
The following list will show the nature of the fauna of these beds, 
which are well seen at Gross Vahlberg, Berklingen, Schandelahe, 
Schoppenstedt, &e. 
Belemnites lateralis, Phil. Pleurotomaria discoidea, Rém. 
Ammonites Astierianus, D’ Ord. Ostrea macroptera, Sow. 
—— bidichotomus, Leym. subcomplicata, Rém. 
radiatus, Brug. (A. asper, Me- | -— Leunisi, Rom. 
rian). micrantha, dm. 
noricus, Schloth. Exogyra Boussingaulti, D’Orb. (E. 
Trochus bicinctus, Rom. (T. tricinctus, subplicata, Rom.). 
om.). —— Couloni, Defr. (very abundant). 
* M. von Strombeck, who first noticed these beds, was so struck with the 
number of fossils agreeing with those figured in Phillips's Geology of Yorkshire 
(omitting the supposed Gault forms) that he named this bed the ‘‘ Speeton- 
Thon.” 
