VINE: CARBONIFEROUS ENTOMOSTRACA, ETC. 237 
Localities : Hurst, Yorkshire. I have the same species from 
Ridesdale : and Mr. Young- gives the locaUties of Scotland, Orchard, 
Robroyston, Brockley. 
10. KiRKBYA UMBONATA, D'Eichwald, (PI. XII., fig. 13.) 
Beyr'ichia umhonata, D'Eichwald, Bulletin Soc. Imp. Nat. Moscou 
1857, p. 312, Leth. Ross., I.-V., 1859, p. 309, VII., p. 1348. 
pi. LII, fig. 10. See also Jones & Kirkby's paper. Some Carb, 
Ostracoda from Russia, Ann. Mag. Nat. Hist., Jan., ^875, 
p. 53-4. 
This is a much smaller form than the other, and it is marked 
with a central umbo. The ventral portion of the valves are thicker, 
and the dorsal border shorter. It is very rare in the shales. 
Localities : Hurst, Richmond ; D'Eichwald gives Sloboda (Car- 
boniferous Shales) ; I have it in my Ridesdale collection, and Mr. 
Young cites Brockley, rather rare, and Craigenglen, Scotland. 
11. KiRKBYA BiPARTiTA, Jones and Kirkby. (PI XII., Fig. 14) 
Transactions of the Geol. Soc. of Glasgow, 1877. 
Catalogue of Western Scot. Foss., p. 44, 185G, Brit. Assoc. Cat. 
This species is likewise rare in the shales. It is smaller than 
even K. umhonata and it is marked with two umbos, or tubercles in 
the valves. In the Yorkshire specimen these are somewhat depressed, 
but still sufficiently prominent to allow of identification. It is a 
beautiful little form, and the valves are ornamented as in some other 
forms of the genus with pitted impressions. 
Localities : Hurst, Richmond, Ridesdale, Northumberland, Scot- 
land ; Orchard, " A rather rare form," J. Young : and Craigenglen. 
I have not found in any of the shales a single specimen of 
Beyrichia or Entomis. In the Scotch shales Beyrichia are generally 
•distributed and Entomis is represented by a single species in the 
Carboniferous shales. The genus, however, has representatives also 
in the upper Silurian rocks. 
There still remains a few forms of Ostracoda that I am not able 
as yet to identify ; I am not certain, but I think that some of these 
may be referred to the genus Cytherella, but for the present I leave 
them. 
The Foraminifera of the shales has been, as I have said pre- 
viously, described by Mr. H. B. Brady, but as I have some of the 
