124 ROMER’S DESCRIPTION OF THE CHALK 
to the English chalk with flints,—especially of the upper chalk, 
the Maestricht beds, and the upper white chalk marl :— 
Credneria? 
Heteropora dichotoma. 
Chrysaora pulchella. 
Pustilopora verticillata. 
Apiocrinites ellipticus. 
Marsupites Milleri. 
Terebratula Defrancii. 
Ostrea sulcata. 
Pecten septemplicatus. 
Pecten Faujasii. 
Exogyra laciniata. 
Pectunculus lens. 
Trigonia aleeformis. 
Crassatella arcacea. 
Goniomya consignata. 
Turritella nodosa. 
Turritella alternans. 
Belemnites mucronatus. 
Ammonites bidorsatus. 
Callianassa Faujasii. 
Serpula filosa. 
Mososaurus Hofmanni. 
Pholadomya caudata. 
It is possible that some of these species may yet be met with 
in the lower chalk also, but the majority will certainly remain 
exclusively peculiar to the upper chalk. The large number of 
minute corals is in general very striking in the latter, and also 
the rarity of marine sponges, which are so generally distributed 
in very large numbers in the lower chalk. The minute corals 
are absent at Aix la Chapelle, Diilmen, Blankenburg, and 
Kieslingswald ; but there remain other fossils in sufficient num- 
ber to prove the affinity of the deposits there, to that of other 
places. As far as I am aware, the fossils of the upper and of the 
lower chalk have hitherto never been enumerated separately 
either in England or in France, and it is therefore impossible 
to determine with certainty how far these countries agree in this 
respect with the north of Germany. 
We may observe moreover, that the whole of the sandstones 
and marls which occur in the south of Sweden, for instance at 
Képing, Kjugestrand, Balsberg, Yngsj6, and Morby, probably 
belong to the chalk, and are of the same age as the rocks above 
described. Formerly these were generally referred to the green- 
sand and quader sandstone. Seams of coal occur in them at some 
points in Sweden, and likewise in the neighbourhood of Qued- 
linburg; at which place many years ago some mining operations 
was carried on in search of minerals. 
