VINE : POLYZOA AND MICROZOA OF YORKSHIRE AND NORFOLK. 365 
Wiltshire, but the whole of the examples catalogued were examined 
and compared with like fossils in other public and private collections. 
Two years after Mr. Wiltshire's paper was published Professor 
H. G. Seeley gave the first of a series of four papers which were wholly 
devoted to the " Red Limestone of Hunstanton. ""^^ In it " he 
reviews the literature of the subject, and notices the weak points of 
the various papers reviewed .... and concludes that the Red rock 
is Upper Greensand, because it is linked to the Chalk, and yet differs 
from it in fossils." In an analytical table of fossils of the red bed 
Professor Seeley shows afhnities with, and differences from, the fossils 
of the Upper and Lower Cretaceous Rocks. 
In 1864 Professor Seeley wrote another paperf on the Hunstan- 
ton Red Rock, which was devoted rather more to the Geological than 
to the Palaeontological aspect of the same. Unless this paper is very 
carefully gone through, and the chalky material of the Hunstanton 
Beds studied by its aid, it is impossible to understand the differences 
between the red beds of Norfolk and Yorkshire. In the one we have 
hard chalk containing pebbles and minute grains, in the other much 
softer chalk, with scarcely any perceptable mixture other than the 
colouring matter present. The Faraminifera, too, of the Yorkshire 
Red Chalk, are much larger than the Hunstanton species. Judging 
from these differences one can easily imagine that the finer deb?'is in 
solution floated farther north in the Red Chalk Sea, whereas the 
coarser material was deposited farther south. 
The Red Rock, says Professor Seeley, "is divisible into three 
parts, HI. Lower, II. Middle, and I. Upper. "In the lower of these 
beds ... as in the others, the little brown and black shining 
pebbles ... in the Carstone pass up. ... The lowest layer is 
sandy, and not more clearly separated from the Carstone below than 
from the concretionary layer above. The top layer is like the sponge 
bed abovej in structure . . . but often there is a thin soapy seam of 
deep red matter. . . . parting them ; and at intervals this enlarges 
into nest-like burrows, which . . . extend for several inches up into 
* Quart. Journ. Geol. Soc , vol. xx., pp. 327-332. 
t Ann. Mag. Nat. Hist, Ser. iii., vol. vii., pp. 233-244, 1861. 
% These beds contain a very peculiar fossil in abundance called Sponqia 
paradoxica, of authors. 
