REFERENCES TO THE PLATES. 429 
References to the Plates of the animal remains of 
the grauwacké series. 
It is my object to conclude the present work by refe- 
rences to and some additional notes on our interesting series 
of fossils, which the reader will find very faithfully delineated 
in the accompanying tables. I am unwilling to trespass 
longer on my reader’s attention, feeling that I may have 
alr eady written more than the public will choose to read, 
but as many naturalists are looking eagerly for information 
on the above subject, I am induced to intrude two or three 
additional pages devoted to a classification of those notes 
which I have from time to time made in reference to the 
various specimens which I have collected. 
The whole of the engravings and lithographs in the 
following tables represent the specimens in their natural 
size, and the same remark applies to those of the fossil 
bones, and to those of the animals which follow. 
TABLE | represents a series of Turbinolites in slate. 
Figs. 1, 2, 3, are of specimens collected in a roofing-slate 
quarry on the new road near Brixton, though all three 
sorts are to be found in other localities also. * Fig. 4 is of 
a large specimen of the Turbinolia which was found to be 
so common in the dense slate at Boveysand by Miss Dixon, 
and afterwards by Miss Hook ; this species likewise is not 
limited to this particular spot, but occurs as I have lately 
discovered at Mudstone near Brixham, in a slate to which 
I can give no other title than clay slate; it is far more 
sectile and frangible than that which is the matrix of the 
specimens at Boveysand. Of this genus there are besides 
the present, many other species, but as yet I have met with 
no specimens of these in a sufficient state of perfection to 
admit of their being engraved for their indentification by 
