THE 



GEOLOGICAL MAGAZINE. 



NEW SERIES. DECADE III. VOL. III. 



No. X.— OCTOBER, 1886. 



OEIGIUAL ARTICLES. 



I. — On some Fringed and other Ostracoda from the Carbon- 

 iferous Series. 



By Prof. T. Kupert Jones, F.R.S., and James W. Ejrkby, Esq. 



(PLATES 1 XI. and XII.) 



AYEAE or two ago we received from Mr. James Bennie, of the 

 Scottish Geological Survey, a washing of Lower-Carboniferous 

 shale from Plashetts, Northumberland, which was very rich in the . 

 remains of Ostracods. Among other species occurring therein was 

 a Beyrichi a -like form, ribbed as in Kirkbya, and with a wide fringe 

 about the free margins of each valve. 



About the same time Mr. Bennie kindly sent us another washing 

 from the Lower-Carboniferous series, Staneshiel Burn, Boxburgh- 

 shire, containing numerous examples of similar fringed and ribbed 

 carapaces. 



Since then the same or nearly allied forms have been found by us 

 in material from other localities, chiefly in the lower portion of the 

 Carboniferous formation. 



These forms, though evidently coming near to Beyrichia and 

 Kirlcbya, can scarcely be placed in either genus, and we propose to 

 group them under the generic name of BeyricMopsis. 



With them we also place a fringed species (PI. XL Fig. 7) that 

 several years ago we found in an impure limestone or cement-stone 

 of the Calciferous Sandstone, at Billow Ness, in Fife. This species 

 has been referred to by us as identical with or nearly allied to 

 BeyricUa crinita, J. and K., in recent papers; 2 and it is evidently 

 the same as one of the forms from Plashetts, though in a different 

 state of preservation. 



Lastly, we include B. crinita in the new genus, for, though as yet 

 but imperfectly known, it is a fringed species, and thus nearest to 

 the forms under notice. 



Beyrichia radiata, J. and K., which has a curious marginal expan- 

 sion or plate, somewhat akin to the fringes of the present species, 

 we scarcely know what to do with, though we leave it in Beyrichia. 



The following is a brief and provisional description of the genus. 



1 These Plates have been drawn with the aid of a grant from the Royal Society 

 for illlustrating fossil Ostracoda. 



2 Quart. Journ. Geol. Soc. vol. xxxvi. 1880, p. 567 ; and Proc. Berwickshire 

 Nat. Club, vol. x. 1884, p. 323. 



DECADE III. VOL. III. NO. X. 28 



