338 
Belemnites lateralis, Phii. 
Nautilus pseudo-elegans, D’ Ord. 
Ammonites bidichotomus, Leym. 
—— Decheni, Rom. (A. bidichotomus 
junior). 
——— noricus, Schloth. 
— Gervilianus, D Oro. 
, Sp. 
Aneleeees grande, Sow. sp. 
(Crioceras) Emmerici, Lév. 
(Crioceras) Duyali, Lév. 
Pleurotomaria Fittoni, Rom. 
Ostrea macroptera, Sow. 
Exogyra sinuata, Sow. (A. aquila, 
Brong.). 
Pecten cinctus, Sow., very abundant. 
orbicularis, Sow. 
muricatus, Goldf. 
—— atavus, Rom. 
Tnoceramus lobatus, Miinst. 
Perna Mulleti, Desh. 
Gervillia anceps ? Desh. 
Ayicula Cornueliana, D’ Orb. (A. ma- 
croptera, Rém.). 
, Sp. 
Pinna gracilis, Phil. (P. rugosa, Rém.). 
Lima moreana, ? D’ Ord. 
. Sp. 
Modiols reversa, Sow. 
Area exaltata, Nélss. 
glabra, Sow. 
concentrica, Rom. 
Pectunculus umbonatus, Sow. (P. de- 
cussatus, 2om.). 
PROCEEDINGS OF THE GHOLOGICAL SOCIETY. 
[Feb. 23, 
Cardium, sp. 
Isocardia neocomiensis, D’ Orb. (Cero- 
mya neocomiensis, Aq.). 
Trigonia pulchella, ? Reuss. 
divaricata, D’ Orb. 
rudis, Park. 
Thetis Sowerbyi, Hém., var. major, 
Sow. 
Thetis Sowerbyi, var. minor, Sow. 
Thracia Phillipsi, Rom. 
elongata, om. 
Panopza Romeri, Gein. 
plicata, Sow. 
— mandibula, Sow. 
Pholadomya elongata, Mist. (P. gi- 
gantea, Sow.). 
—— alternans, Rom. 
designata, Goldf. 
—— nodulifera, Wiinst. 
Anatina Cornueliana, ? D’ Orb, 
Waldheimia celtica, Mor. (Ter. longa, 
Rém.). 
Terebratula prelonga, Sow. (T. bipli- 
cata, var. acuta, Von Buch). 
Rhynchonella multiformis, Rom. 
Lingula truncata, Sow. = L. Meyeri, 
Dunker. 
Diadema, sp. (very rare). 
Holaster levis, Rom. 
Toxaster complanatus, 4g. (one speci- 
men). 
Heteropora ramosa, Dunk. & Koch. 
Ceriopora (Alveolites) tuberosa, Rim. 
| Eschara, sp. 
4. Hanover.—Passing over a considerable area in which no ex- 
posure of Neocomian beds is found (with the exception of a clay 
near Minden, abounding with Thracia Phillipsi, Rom.), we come 
into Hanover, the native country of M. Fr. Ad. Romer, and that in 
which these strata were most fully described and illustrated by 
him, under the names of “ Hilsthon” and “ Hilsconglomerat’’*. 
More recently, the strata of this country have been mapped by his 
brother, M. Hermann Romer. 
The Neocomian beds of Hanover are chiefly exposed on the flanks 
of the various hill-chains of the country (which rise above great 
plains covered with drift), as the Deister, the Lindener Berg, the 
Osterwald, the Suntel, and especially the Hils, from which latter 
the beds take the name by which they are most generally known in 
Northern Germany. 
Throughout Hanover, the Neocomian is usually represented by 
thick beds of blue clay (Hilsthon) which, however, locally pass into 
oolitic ironstones and sandstones. The upper part of these clays 
* The name “ Hilsconglomerat”’ was applied to a number of strata of some- 
what different ages, viz.:—1. the Greensand of Essen or the Tourtia (of Upper 
Greensand age ?); 2. the ironstones of Steinlahde, the Osterwalde, &c. (Middle 
Neocomian) ; 3. the Lower Neocomian Limestones &c. of Brunswick. 
