263 



32. CYTHERIDEA VULSA,* $2). 71. 



PI. ii., figs. 4 a, b. 



Sub-oblong, rounded in front, obliquely rounded behind, 

 straight on the ventral and dorsal margins. Hinge-line long and 

 distinct, terminating anteriorly with a faint tubercle. Surface 

 irregularly convex, depressed and sulcate in the dorsal region, 

 and raised along the ventral region, as if forcibly pinched up. 

 The general appearance, looking at the carapace with the dorsal 

 margin uppermost, is that of a partially melted wax seal, 

 hanging in a curved lump away from the upper margin, and 

 showing a furrow at the top. 



One specimen from the Blue Fullers-earth Clay, Midford.; 

 another specimen of this form has been sent to us by Mr. E. A. 

 Walford, F.G.S., from the base of the Fullers-earth Oolite 

 between Notgrove and Bourton. 

 < • 



33. CYTHERIDEA HORATIANA, q). 11. 



PL ii,, figs. 5 a, h. 

 This large, smooth, and somewhat oval form, has a short 

 hinge-line in the middle of an arched dorsal margin, with a 

 -strong shoulder. The ventral margin is nearly straight, but 

 -sinuous, owing to a slight median convexity. The ends are 

 ■ rounded, rather narrow ; the anterior largest, but more com- 

 -pressed than the posterior. The lucid spots of the muscle-mark, 



seen through the shell, are arranged in a group much the same 

 ,as in other Cytheridece. Hingement the same as in pi. L, fig. 2, 



There is some fine punctation on the surface of the posterior sixth 



of the carapace, but it is not shown in the figure. 



We name this species after Mr. Horace B. "Woodward, F.G.S., 



to whom we are indebted for some of the material from which 



these forms were obtained. 



, Three examples ; Blue Fullers earth Clay, Midford. 



* Pulled out, or pinched up. 



