132 
ORGANIC REMAINS. 
beneath, that it is difficult at present to point out what seem to be cha- 
racteristic. The inferior oolite sand or dogger, on the contrary, besides 
including a great number of species, which likewise occur in the superior 
strata, and a few which are repeated in the lias below, is well discrimina- 
ted by several remarkable fossils. Gastrochasna tortuosa, trigonia striata, 
gervillia lata, mytilus cuneatus, cuculhea reticulata, lingula Beanii, nerita 
costata, natica tumidula, (nerita minuta, Min. Conch.) turbo Itevigatus, 
solarium calix, trochus pyramidatus, and trochus bisertus, have not, I 
believe, been found in any other stratum than the inferior oolite and its 
accompanying sand, in any part of England. 
FOSSILS OF THE LIAS FORMATION. 
Wood of dicotyledonous trees, with knots and medullary rays, the external layers 
often converted to jet, occurs in the upper and lower shales, and more rarely in the in- 
termediate marlstone beds. 
Remains of zoophyta are universally of most rare occurrence in the lias, and 
especially in Yorkshire. 
RADIARIA. 
Cidaris, a smooth spine ... ... PI. XIII. fig. 17- 
Ophiura Milleri ... ... fig. 20. 
Pentacrinus. — 1. Medusas (Miller, Crinoidea.) 
2. Briareus (Miller) 
In the marlstone. 
Staithes, in the marlstone. 
Diffused in the lias, but not 
abundantly. 
Near Redcar. 
My a literata (Min. Conch.)... 
Sanguinolaria. — 1. vetusta 
2. elegans 
Pholadomya obliquata 
Amphidesma. — 1. donaciforme 
2. rotundatum 
MOLLUSCA. 
PI. VII. fig. 5. 
PI. XIV. fig. 1. 
PI. XII. fig. 9. 
PI. XIII. fig. 15. 
PI. XII. fig. 5. 
fig. 6. 
In marlstone, rare. 
Marlstone, Rosebury, lower 
shale, Robin Hood's Bav- 
in calcareous nodules (rare.) 
In marlstone, Bilsdale, 
Rosebury, &c. 
Upper shale, hard shale, &c. 
Upper shale, and marlstone. 
