CORALLINE OOLITE. 
105 
eorallopliagous shells, pholas recondita, and modiola ? inclusa ; tellina 
ampliata ; several species of crassina, cucullaea, ostrea, and terebratula ; 
and generally the shells of ceplialous mollusca. 
Thirdly, a great number of the shells in this stratum occur again, 
with only slight variations, in several of the conchiferous strata below ; 
as, turritella muricata and t. cingenda in the inferior oolite ; perna qua- 
drata in the middle oolite ; mya literata, clypeus clunicularis, and gale- 
rites depressus in the cornbrash ; corbula curtansata, pecten demissus, 
spatangus ovalis, ammonites perarmatus, and astacus rostratus in the 
Ivelloways rock. 
Here again we find that agreement between the conclusion obtained 
by considering rocks in relation to their position and quality on the one 
hand, and their organic contents on the other, which is the most satis- 
factory proof of the accuracy of each mode of investigation. For either 
of these methods of inquiry will convince us of the propriety of group- 
ing together all the strata from the coralline oolite downwards to the 
inferior oolite, in one great family of rocks naturally divided into two 
formations, as expressed in the general table of Yorkshire strata, pages 
2 and 3 . 
FOSSILS OF THE LOWER CALCAREOUS GRIT. 
REMAINS OF PLANTS. 
Wood of a dicotyledonous plant 
... Leavening, Scarborough, &c. 
ZOOI'HYTA AND RADIARTA. 
Spongia (a confused mass) 
Round smooth crinoidal column 
Muricated ditto ... 
Echinus germinans 
PI. III. fig. 9. Ditto, 
fig. 15. Ditto. 
Scarborough ' 
Ditto. 
Also in the 
- coralline 
oolite. 
P 
