VINE: CAEBONIFEEOUS ENTOMOSTEACA, ETC. 229 
of previous authors, I have been anxious also to see how far these 
agree with the same species found in the Northumberland, and also 
in the Scotch shales, a large suite of which are in my collection. 
In all my varied labours I am personally indebted to the continuous 
kindness of Mr. John Young, of Glasgow, who, on every occasion 
that I have sought his help by way of gift or loan of specimens, 
has systematically granted it, and information on all questions put 
to him has been unstintedly given. 
With regard to the Foraminifera of these shales, I find, in 
reference to Mr. Henry Bowman Brady’s Monograph of the Carbon- 
iferous and Permian Foraminifera,* that my labours are anticipated. 
In that work, Mr. Brady specially cites two localities in Yorkshire 
from which he received material for his work. One of these is 
“ Hurst,” Yoredale, and the other “Downholm”; the material from 
each locality supplied by Mr. Wood, of Richmond. I was not aware, 
however, that Mr. Wood had devoted any share of his attention to 
the more minute fossils. Before him, Phillips described a species 
for which he founded the genus Endothyra , but very little progress 
was made till just before, and just after, the publication of Mr. Brady’s 
Monograph. In this work, I find that the material of Hurst and 
Swaledale yielded sixteen species of Foraminifera, a list of which is 
given further on. As with other forms, so with these, the Scotch 
Geologists have systematically searched their shales, and the Scotch 
list is, consequently, by no means inconsiderable. Though not so 
fortunate as Mr. Brady and others, I have been successful in my 
findings of foraminifera, as well as Entomostraca, but species of 
either group are far from abundant. Much good material, however, 
ma}' be found and catalogued, but willing hands and keen eyes must 
be given to the work. 
GEUSTACEA. 
Sub. Class Entomostraca. 
Order Ostracoda . — “ Minute Crustaceans having the entire body 
enclosed in a shell or carapace, which is composed of two valves 
united along the back by a membrane. The valves are capable of 
being closed by an adductor muscle, the insertion of which is marked 
* Pal. Soc., London, 1876. 
