25G 



midway between Notgrove and Bourton-on-the- Water, east of 

 the Harford-road Bridge, in Gloucestershire and within the 

 Cotteswolds region. The section has been described by Mr. 

 Walford in the Quart. Journ. Geol. Soc, vol. xxxix., 1873, p. 225 ; 

 and the Ostracoda were obtained by washing the nodules there 

 described as occurring at the base of the Fullers-earth Blue Clay. 

 C. JFalfm-diana is represented by one valve of the usual sub- 

 oblong form of this class of Cythere. Rather larger than the 

 majority of the specimens from Midford. The anterior hinge 

 is distinct; and near it are two oblique transverse furrows on 

 the valve, with a triangular swelling between them, having its 

 apex directed forwards. The anterior margin is thickly rimmed ; 

 and a coarse reticulation covers the valves. 



. We name this species after Mr. E. A. Walford, F.G.S., through 

 whose kindness we are enabled to catalogue several new forms 

 of Ostracoda from the above-mentioned clay found between 

 Notgrove and Bourton. 



15. CYTHERE TRAPEZIOIDES, Sp. n. 



PI. v., figs. 10 a, b, c. 



Convex, oblong, with the front hinge strongly expressed. 

 Obliquely rounded at the ends, and nearly trapezioidal. Posterior 

 extremity suddenly compressed to a flat narrow rim. An 

 irregular wrinkling of the surface is observable on some parts of 

 the valve. The tubules perforating the test, in the subconcentric 

 pits, falsely appear, in some lights, under the microscope as 

 projecting spines, a condition observable in other Ostracoda. 



From the base of the Fullers-earth Oolite between Notgrove 

 and Bourton. In Mr. E. A. Walford's collection. 



16. CYTHEREIS FULLONICA,* sp. 11. 



PI. iv., figs. 13 a, b, c. 

 This little form is of considerable interest, as it is the first or 



* Having refei'ence to the Fullers-earth. 



