304 Prof. T. 11. Jones and Mr. J. W. Kiikby on the 



3. Bythocypris (?) cuneola^ Jones and Kirkbv, var. 

 (PI. XVI. fig. 4.) 



Byffioci/pn's (?) cuneoln, J. & K., Ann. & Ma?. Xat. Hist. ser. 5, 

 vol. xviii. 1880, p. 250, pi. vi. fig's. 1 and 2. 



Fig. 4 represents a single specimen of a small Ostracod 

 that is cloubtlully identified with B. (?) cuneola. It has about 

 the same size and general appearance, but its extremities are 

 too nearly alike ; and its edge- view is scarcely cuneiform 

 enough for exact agreement with that species. It may, 

 however, be a variety of it. 



B. (?) cuneola is a common species in the Carboniferou.s- 

 Limestone series of the North of England and Scotland. 



4. Bairdia curia, M^Coy. (PI. XVI. fig. 5.) 



Bairdia curia, M'Coy, Jones and Kirkby, Quart. Journ. Geol. Soc. 

 vol. XXXV. 1879, p. 567, pi. xxviii. figs. 1-8. 



The specimen here figured is a nearly perfect individual of 

 B. curia (there are other specimens more or less imperfect), 

 and it shows the elegant form and broad subangulate anterior 

 extremity characteristic of this species. 



B. curia was the first- discovered representative of the 

 genus, and, though now well known as a British Carboniferous 

 fossil, it is nowhere abundant, nor had it until now been 

 found out of the British Isles. 



5. Bairdia suhelonqata ^ Jones and Kirkby. 

 (PI. XVI. fig. 6.) 



Bairdia stdjclongata, J. & K., Quart. Journ. Geol. Soc. vol. xxxv. 1879, 

 p. 573, pi. XX.X. figs. 1-11 and 16. 



Many of the specimens of this small set of Mongolian 

 Ostracoda belong to B. suheJovgaia ; and, though one of the 

 mo.st typical has been chosen for illustration, there are others 

 showing much the same range of variation that obtains in 

 series of British specimens, as noticed in our memoir on 

 Bairdia (Quart. Journ. Geol. Soc. 1879). 



B. auhelongaia is a well-known sju'cies from the Carbon- 

 iferous-Limestone series of Scotland and the north of Entjlaud. 



6. Bairdia pkbeia, Reuss. (PI. XVl. figs. 7 and 8.) 



Bairdia plebeia, Reuss, Jahresb. Wetterau. Ges. 1854, p. 67, fig. 5 ; 

 Jones and Kirkbv, Quart. Journ. Geol. Soc. vol. xxxv. 1879, 

 p. 6t.9, pi. xxviii. figs. 9-19. 



