30 



CARBONIFEROUS ENTOMOSTRACA. 



5. Cypridellina galea. Sp. nov. Plate IV, figs. 3 a — c. 



Carapace round-egg-shaped, very gibbose ; apiculate and indented behind ; strongly 

 notched high up on the front, which slopes downwards and outwards, forming a strong 

 prominent prow with the upward and outward curve of the antero-ventral margin. 

 Edges of notch thickened. Tubercle large, just above the centre. Edge-view broad- 

 ovate ; end-view suborbicular, somewhat pentagonal. 



Length f ; height -^\ thickness \ inch. Proportions 13 : 10 : 12. 



Cypridellina galea stands alone ; distinct by shape, gape, and other features. The 

 specimen is a shell hi the Carboniferous Limestone of Little Island, Cork. Collected 

 by Mr. J. Wright, E.G.S. 



6. Cypridellina vomer. Sp. nov. Plate III, figs. 7 a — c ; 10 a — c. 

 6.* Var. cultrata (fig. 10). 

 6.* Var, uncinata (not figured). 



Carapace-valves ovate-oblong, with suboval outline posteriorly ; sloping, notched, and 

 produced in front, with somewhat variable contours, either like a ploughshare with small 

 notch (fig. 10 «, much resembling fig. 11), with a hatchet-like curve and large notch 

 (var. cultrata, fig. 7 a), or curved still more suddenly downwards with a narrow, blunt, 

 backward bending angle and a broad shallow sinus (var. uncinata, not figured). 



The valves are rather compressed, with a variable convexity, and are faintly 

 tubercled high up ; the tubercle is almost obsolete in some more convex specimens. 

 Edge-view of carapace long acute-ovate. End-view acute-oval. 



Cypridellina vomer, fig. 10. Length |^; height ^; thickness -j^a inch. Prop. 9:5:4. 



C. vomer, ^?lx. cultrata, ^g.l. „ -i^; „ y; „ ira » » 10:7:4. 



C. vomer, var. uncinata (not fig.) „ \; „ \\ „ ^ » >> 9:6:5. 



The feebleness of the tubercle reminds us of a weak local elevation on the valves of 



Cypridina Brady ana, p. 15 ; but the shape of Cypridellina vomer is far more closely 



analogous to that of Cypridinella vomer, p. 25, without in any case being exactly the same. 



We have here rather the touchings of isomorphs than the coalescence of congeneric forms. 



Cypridellina vomer, in its varieties, is common in the Carboniferous Limestone of 



Little Island, Cork, both as casts and shells, more or less weathered. Collected by 



Mr. Joseph Wright, F.G.S. 



