10 CRETACEOUS ENTOMOSTRACA. 



2. Macruoypeis Wrightii, sp. nov. Plate II, figs. 43, 44. 



Maceocypeis siliqua, Jones. System. Lists, «fec., Belfast Nat. Field Club, vol. i. 



Appendix iii, 1875, pp. 81 and 92. 



Length 2'58 ; height '83 ; thickness '83 mm. 



Val^e elongate, convex, smooth ; neatly curved on the dorsal, and gracefully 

 sinuate on the ventral border ; narrow and rounded anteriorly, acute posteriorly. 

 Grreatest height behind, and greatest thickness at the middle. The united valves 

 would have a long-acute-oval edge view, and an oval end view. 



This elegant species is here named after Joseph Wright, Esq., F.Gr.S., of 

 Belfast, who has contributed very much to our knowledge of both the fossil and 

 the recent Microzoa of Ireland, and by whom this specimen was collected from 

 the Chalk (powder in flint) at Ballytober, island Magee, co. Antrim. 



§ II. Species of the group comprising Macrocypris setigera, maculata, &c., Brady. 



3. Maceocypeis MuenstbrianAj sp. nov. Plate II, figs. 42 and 45 — 47. 



Baiedia siliqtia, var. a, Jones. Monogr. Eutom. Cret., 1849, p. 25, pi. v, 



figs. 16 e,f, g. 

 Maceocypeis aecuata, Jones. Geo!. Mag., 1870, pp. 75, 77. 



Fig. 42. Length 'l^o ; height '32 mm. 



Fig. 45. „ -72 ; „ -27 (?) ; thickness '27 mm. 



This form is distinct from Cytliere arcuata,^ Miinster, as figured by Romer, 

 Reuss, and Bosquet, not being merely arcuate by a more or less obliquely arched 

 dorsal, and centrally incurved ventral margin, for it is well arched on the back, 

 the curve falling into the rounded anterior extremity, and sloping with a hollow 

 curve to the pointed end, and the sinuous ventral outline is incurved at the 

 anterior third. The greatest height is behind the middle, and the greatest 

 thickness at the middle. The edge view is compressed acute-oval;- end view 

 oval. This species is named after Count Georg von Miinster, one of the earliest 

 observers and describers of fossil Ostracoda. 



^ None of the published illustrations are sufficiently like our figures to substantiate the provi- 

 sional reference made in the ' Geol. Mag.,' 1870, p. 75. Indeed, the published figures differ among 

 tliemselves, and we cannot agree with Dr. Keuss's synonyms as offered in bis article ou " Bairdia 

 arcuata, v&r./aha," ' Elbthalgeb.,' pp. 141, 142. 



