62 PERMIAN FOSSILS. 
No. 3. CYTHERE GEINITZIANA, nobis. Tab. VI, fig. 46; and Tab. XVIII, 
fig. 4 a, 6, ©. 
Thickness, =), 
Carapace elongate reniform, convex, smooth, slightly punctated towards the anterior 
extremity. Rounded anteriorly, slightly bordered, and somewhat depressed ; tapering 
and more convex posteriorly. Ventral border sinuous; dorsal elliptical, shelving 
downwards posteriorly to form a subacute angle with the ventral border. 
Dorsal aspect elongated ovate ; anterior ovate. 
One specimen from Humbleton. 
No. 4. CYTHERE ELONGATA, J/inster. Tab. XVIII, fig. 5. 
CYTHERE ELONGATA, Miinster. 1830. Jahrbuch f. Min., p. 65, n. 19. 
INCH, 
Length, ,1, 
Height, 
Carapace bean-shaped, smooth, convex. Dorsal and ventral borders curved at the 
middle. Hztremities rounded; the anterior rather oblique. 
Minster’s description of C. elongata (from the Bergkalk of Regnitzlosan) is very 
succinct, but, as far as it goes, is applicable to this species. 
A single specimen, imbedded in a fragment of Magnesian Limestone, dredged up 
near the Dogger Bank. 
No. 5. CyTHERE KuToreGiana, zobis. Tab. XVIII, fig. 6. 
INCH. 
Length, 1 
DBO 
Height, 25 
Carapace somewhat bean-shaped, convex. Dorsal border elliptical; its contact- 
margin thickened, and bearing trace of hinge; ventral sinuous. Anterior extremity 
obliquely rounded ; posterior acute. 
This probably belongs to the group of Cythere proper: it is not uncommon at 
Byers’ Quarry. 
