Occurrence: Peedee and Black Creek, localities 

 A, B, G, H, I; J, and K. U.S.N.M. 128932. 



Remarks: The present specimens are variable 

 in surface sculpture medially. In general outline 

 and other features they resemble B. ledaforma 

 (Israelsky). The writer considers that the minor 

 differences shown by the present specimens are 

 not sufficient to permit differentiation from B. 

 ledaforma (Israelsky). 



Brachycythere raleighensis Brown, n. sp. 



Plate 4, Figures 11-13 



Shell in side view, ovate, subtriangular ; dorsal 

 margin strongly arched, nearly straight along the 

 hinge line; ventral margin straight; anterior 

 margin obliquely rounded, posterior margin com- 

 pressed, triangular with subacute postero-ventral 

 angle; left valve larger than right, most pro- 

 nounced medio-dorsally. 



Anterior margin ventrally, with about five short 

 spines ; posterior extremity with one or two short 

 incipient spines. Inflated midportion reticulate, 

 coarse puncta arranged subconcentrically. Venter 

 with about six rows of pits parallel to the margin 

 and separated by five ridges. Anterior furrow as 

 in B. ledaforma. 



Dimensions : Holotype : length 0.62 mm ; height 

 0.32 mm; biconvexity 0.33 mm. 



Occurrence : Peedee only, localities A and F. 

 U.S.N.M. 128933, 128934, 128935. 



Remarks: This species bears a strong relation- 

 ship to B. ledaforma (Israelsky) and seems to be 

 intermediate between that species and B. fora- 

 minosa Alexander from the Paleocene. 



Genus Alatacythere Murray and Hussey, 1942 



Alatacythere alata atlantica (Schmidt) 



Plate 4, Figures 1, 2 



Brachycythere alata atlantica Schmidt, 1948, 

 Jour. Paleontology, vol. 22, p. 415, pi. 61, 

 figs. 23-24. 

 Carapace large in side view; left valve larger 

 and overlaps right valve along middle dorsal mar- 

 gin ; dorsal margin weakly concave, strongest an- 

 terad ; ventral margin slightly sinuous ; anterior 

 margin broadly rounded, ventral and median 

 thirds rimmed, with double row of about nine 

 plate-like spines ; posterior margin evenly round- 

 ed, subcaudate, with about six long plate-like 

 spines, strongest ventrally. 



Exterior smooth, translucent. Strong ala and 

 projecting spines along ventral lateral edge. Well 

 developed plate-like spine on posterior alial slope. 



Hingement, musculature, and radial pore canals 

 typical of the genus. 



Dimensions : Fig. 1 : length 0.96 mm ; height 

 0.51 mm. 



Occurrence: Peedee only, localities A and C. 

 U.S.N.M. 128936, 128937. 



Remarks: The writer considers the genus Ala- 

 tacythere Murray and Hussey to be valid for those 

 species that exhibit the hingement of the geno- 

 type, Alatacythere ivani (Howe and Law). 



Genus Trachyleberis Brady, 1898 



Trachyleberis bassleri (Ulrich) 



Plate 7, Figures 10-14 



Cythereis bassleri Ulrich, 1901, Maryland Geol. 

 Survey, Eocene, p. 120, pi. 16, figs. 19-21. 

 Weller, 1907, Geol. Survey New Jersey, vol. 



4, p. 843, pi. 110, figs. 1-3. 

 ? Cushman, 1925, Bull. Am. Assoc. Petroleum 



Geologists, vol. 9, p. 302, pi. 8, figs. 3a-c. 

 Alexander, 1934, Jour. Paleontology, vol. 8, 



p. 219-220. 

 Jennings, 1936, Bull. Am. Paleontology, vol. 



23, no. 78, p. 51, pi. 7, figs. la-b. 

 ? Van den Bold, 1946, Cont. Study Ostracoda, 



p. 94, pi. 6, fig. 20. 

 Schmidt, 1948, Jour. Paleontology, vol. 22, 



p. 422, pi. 64, fig. 13. 

 Swain, 1948, Maryland Geol. Survey, Bull. 



2, p. 197, pi. 13, fig. 7. 

 Munsey, 1953, Jour. Paleontology, vol. 27, p. 

 8, pi. 4, figs. 6, 7, 12-14. 

 Cythereis bassleri lata Jennings, 1936, Bull. 

 Am. Paleontology, vol. 23, no. 78, p. 52, pi. 7, 

 figs. 2a-b. 

 Cythereis claibornensis Gooch, 1939, Jour. Pa- 

 leontology, vol. 13, p. 581, pi. 67, figs. 5, 6, 10. 

 Stephenson, 1946, Jour. Paleontology, vol. 20, 

 p. 336, pi. 45, fig. 4. 

 Cythereis bassleri reticulolira Schmidt, 1948, 

 Jour. Paleontology, vol. 22, p. 423, pi. 64, figs. 

 14, 15. 

 Cythereis plusculmenis Schmidt, 1948, Jour. 



Paleontology, vol. 22, p. 422, pi. 64, figs. 2-4. 



Paracythereis potomaca Schmidt, 1948, Jour. 



Paleontology, vol. 22, p. 419, pi. 64, figs. 18-19. 



Trachyleberis ? bassleri (Ulrich), Swain, 1951, 



Ostracoda from wells in North Carolina, 



