34 



CARBONIFEROUS ENTOMOSTRACA. 



2. Cypridella Koninckiana, Jozies. Plate III, figs. 14 a — c ; figs. \^a,h; and 



figs. 17 a — d. 



Cypkidella Koninckiana, Jones, 1870. Month. Micr. Journ., vol. iv, p. 185, pi. Ixi, 



fig. 9. 



Carapace-valves ovato-triangular ; convex ; some with less vertical diameter than 

 others, the ventral region being protruded into a blunt angle (fig. 14 a) in the latter. 

 Dorsal line slightly convex, with a median depression, due to the nuchal furrow ; posterior 

 strongly apiculate and indented ; anterior edge nasute, being deeply notched, produced 

 above into a hook and almost vertical below, with a shght swelling or sigmoid curve not 

 projecting out so far as the hood and beak. Tubercle usually strong, but variable ; furrow 

 distinct. 



Fig. 16. Length \ ; height y ; thickness ^ inch. Proportions 11^ : 7 : b^. 



Fig. 17. jj y j j> ' »> y " » ^'^^ '■ ^'k '■ ■ 



Fig. 14. „ I; „ „ i „ „ Hi -AO :8. 



Figs. 17 d, e are three-quarter views of this species partly imbedded, to compare with 

 PI. IV, figs. 5, 6, 7, 8, which belong to different animals. 



This is a well marked species, very common and well preserved in the Carboniferous 

 Limestone of Little Island and the neighbourhood of Cork, Ireland. Collected by Mr. J. 

 Wright, F.G.S., and dedicated to the veteran palgeontologist of Belgium — Prof. Dr. L. 

 de Koninck, of Liege, to whom we owe an early acquaintance with some of the most 

 interesting of the fossil CypridinadcB, and of the present geuus in particular. 



3. Cypridella obsoleta. Sp. nov. Plate III, figs. 12 a — c. 



Carapace bean-shaped ; ovate-oblong in side-view ; apiculate behind at the middle ; 

 strongly notched and hooded in front. Tubercles and sulcus both faint, but much 

 stronger on the left than on the right valve (figured). 



Length \ ; height \ ; thickness \ inch. Proportions 9:6:5. 



The specimen, retaining a film of much-weathered shell, was collected by Mr. J. 

 Wright, F.G.S., from the Carboniferous Limestone of Little Island, near Cork; and we 

 know of none like it among our Cypridinads. The slight expression of its generic 

 characters (tubercle and furrow) gives rise to its proposed name. 



4. Cypridella Wrightii. Sp. nov. Plate IV, figs. 1 a — c. 



Carapace oviform, but truncate and broadly notched anteriorly, and locally thickened 

 by two very large hemispherical tubercles, one on either side of the antero-dorsal region. 

 The rounded hinder end is marked by the circular base of a spinous apex. 



