to represent a variant of that commonly found in 

 the subgenus Haplocytheridea Stephenson. These 

 atypical examples of hinge structure are in need 

 of further study as has been pointed out by the 

 writer and others. Schmidt (1948, p. 426) has 

 recently described the species. 



Cytheridea (Haplocytheridea) carolinensis 



Brown, n. sp. 



Plate 2, Figures 17-20 



Shell subtriangular in side view; highest me- 

 dially ; dorsal margin gently convex, straight pos- 

 terad; ventral margin sinuous; anterior margin 

 broadly and evenly rounded ; posterior margin 

 less broadly rounded. Left valve larger than right 

 except along anterior margin. 



Posterior and anterior fourths inflated, sur- 

 mounted by bulbous ridges subparallel to anterior 

 and posterior margins respectively ; anterior slope 

 in front and below ridge sharply truncate, pass- 

 ing into compressed marginal area; posterior 

 slope sharply truncate dorsally, bulbous above 

 ventrally, passing into narrowly compressed mar- 

 ginal area. 



Surface finely reticulate in posterior and ante- 

 rior thirds; medially, between bulbous extremi- 

 ties, are three to four deeply pitted furrows more 

 pronounced anterad and dorsad. 



Hinge of left valve ; terminal crenulate sockets 

 and narrow crenulate interterminal groove, sep- 

 arated from dorsal margin by weakly developed 

 accommodation groove. Hinge of right valve an- 

 tithesis of left. 



Dimensions : Holotype : length 0.56 mm ; height 

 0.30 mm; biconvexity 0.22 mm. 



Occurrence: Peedee only, localities A, D, and F. 

 U.S.N.M. 128987, 128988, 128989, 128990. 



Remarks: In bulbous extremities this species 

 resembles C. oblongus n. sp. (p. 19). The me- 

 dial pitted furrows and bulbous ends serve to 

 distinguish this species. Female dimorphs are 

 shorter and more tumid, medially, than the males. 



Cytheridea (Haplocytheridea) punctura 



( Schmidt ) 



Plate 2, Figures 26-28 



Haplocytheridea punctura Schmidt, 1948, Jour. 

 Paleontology, vol. 22, p. 425, pi. 61, figs. 27- 

 31. 

 Dimensions : Fig. 26 : female ; length 0.70 mm ; 

 height 0.46 mm. 



Fig. 27: male; length 0.82 mm; 

 height 0.44 mm. 



Occurrence: Peedee only, localities A, C, E, and 

 F. U.S.N.M. 128991, 128992, 128993. 



Remarks: Schmidt (1948, p. 425) has recently 

 described the species. 



Cytheridea (Haplocytheridea) monmouthensis 

 Berry 



Plate 2, Figure 6 

 Cytheridea monmouthensis Berry, 1925, Am. 

 Jcur. Sci., 5th ser., vol. 9, p. 486, fig. 10. 

 Alexander, 1929, Texas Univ. Bull. 2907, 

 p. 74, pi. 5, figs. 11-14. 

 Cytheridea (Haplocytheridea) monmouthensis 

 Berry, Swain, 1948, Maryland Dept. Geology, 

 Mines, and Water Res. Bull. 2, p. 212, pi. 14, 

 fig. 14. 

 Haplocytheridea monmouthensis (Berry) 

 Swain, 1952, Ostracoda from Wells in North 

 Carolina: pt. 2, Mesozoic Ostracoda, U. S. 

 Geol. Survey Prof. Paper 234-B, p. 79, pi. 8, 

 fig. 19. 

 Dimensions: Fig. 6: female; length 0.68 mm; 

 height 0.44 mm ; biconvexity 0.33 mm. 



Occurrence: Peedee and Black Creek, localities 

 A, C, D, G, H, I, J, and K. U.S.N.M. 128994. 



Remarks: The strength of the median sub- 

 vertical furrows varies with individuals. Internal 

 features that of the genus. Swain (1952, p. 79) 

 has recently described the species. 



Subgenus Clithrocytheridea Stephenson, 1936 



Cytheridea (Clithrocytheridea) oblongus 



Brown, n. sp. 



Plate 2, Figures 21-25 



Carapace in side view, oblong; highest antero- 

 median, widest medially ; dorsal margin slightly 

 arched along anterior third, straight along pos- 

 terior third ; ventral margin sinuous, concave me- 

 dially ; anterior margin rounded, obtuse ventrally ; 

 posterior margin more sharply rounded, obtuse 

 ventrally. Left valve larger than right and over- 

 laps, most pronounced ventrally and along pos- 

 terc-dorsal third. 



Carapace finely reticulate, irregular ; reticula- 

 tions extend laterally in closely-spaced irregular 

 rows along median and ventro-lateral surfaces ; 

 reticulations are subarcuate along dorsal portions 

 of carapace. There is an inflated ridge paralleling 

 the anterior margin which is sharply truncate in 

 front ; a posterior ridge above the posterior mar- 

 gin is sharply truncate at the posterior margin 



19 



