Andrews former head of the geology department, 

 University of Alabama. 



Cytherelloidea inflata Brown, n. sp. 

 Plate 1, Figures 20, 21, 25 



Carapace small, ovate in lateral view; inflated 

 anteriorly, more so posteriorly; dorsal margin 

 weakly arched ; ventral margin straight ; anterior 

 margin broadly and evenly rounded ; posterior 

 margin gently rounded dorsally, angulate ven- 

 trally. 



Anterior and ventral margins with well devel- 

 oped rims. Posterior fourth, with a steep slope to 

 the posterior margin, is surmounted by ill-defined, 

 weakly connected, dorsal and ventral tubercles ; a 

 strong ridge above and parallel to the ventral 

 margin extends from the ventral tubercle ante- 

 riorly, and terminates submedially in the anterior 

 third of the carapace. A short ridge extends me- 

 dially from the dorsal tubercle and terminates 

 just short of a prominent subcentral pit. A second 

 bulbous ridge extends from the dorsal tubercle, 

 extends parallel to and above the dorsal margin, 

 swings inward at the antero-dorsal junction and 

 terminates in inflated anterior third. A short ill- 

 defined ridge, extending from the inflated anterior 

 third, outlines the subcentral pit below. 



Dimensions : Holotype : length 0.50 mm ; height 

 0.32 mm; biconvexity 0.21 mm. 



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

 U.S.N.M. 128914, 128915, 128916. 



Remarks: This species bears superficial resem- 

 blance to C. stvaini Brown but can be separated 

 on the basis of its longer and continuous ventral 

 ridge, posterior slope and less well-defined tu- 

 bercles. 



Suborder Podocopa Sars, 1866 

 Family Bairdiidae Sars, 1888 

 Genus Bairdia McCoy, 1844 



Bairdia pittensis Brown, n. sp. 

 Plate 3, Figures 1-3 



Carapace small, subquadrate in lateral view; 

 highest medially ; hinge margin straight medially, 

 broadly obtuse at cardinal angles ; ventral margin 

 straight to sinuous; anterior margin obtusely 

 rounded and extended; posterior margin acumi- 

 nate and extended below. Left valve larger than 

 right, overlapping, greatest overlap along pos- 

 tero-dorsal slope. Surface of valves strongly and 

 finely pitted. 



The internal features, showing the lack of hinge 

 denticulations on the dorsal slopes place this spe- 

 cies in the genus Bairdia McCoy. The muscle scar 

 consists of a long lateral scar below which are 

 four parallel offset scars two on each side of a 

 circular area and below which is a sixth large 

 scar parallel to the topmost lateral scar. Interior 

 of the valves are coarsely punctate. Inner margin 

 and line of concrescence widely separated at an- 

 terior and posterior extremities. 



Dimensions : Holotype : length 0.64 mm ; height 

 0.31 mm ; biconvexity 0.24 mm. The two valves of 

 the holotype were separated after being measured. 



Occurrence: Peedee only, locality A. U.S.N.M. 

 128917. 



Remarks : This species most closely resembles 

 Bairdia fortificata Brady from Tertiary and Re- 

 cent sediments. It can be separated from that spe- 

 cies by its more discretely punctate surface, nar- 

 rower posterior margin and smaller size. Two 

 complete carapaces and a left valve were the only 

 specimens obtained at the outcrop. However, be- 

 cause of its unique appearance and its occurrence 

 in several wells it has been described and figured. 



Genus Bairdoppilata Coryell, Sample, and 



Jennings, 1935 



Bairdoppilata pondera Jennings 



Plate 3, Figures 4, 7, 8 



Bairdoppilata pondera Jennings, 1936, Bull. Am. 



Paleontology, vol. 23, no. 78, p. 45, pi. 6, fig. 9. 



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

 408, pi. 61, figs. 21, 22. 



Swain, 1952, U. S. Geol. Survey Prof. Paper 

 234-B, p. 71, pi. 8, figs. 8-12. 



Dimensions: Fig. 7: length 1.18 mm; height 

 0.75 mm; biconvexity 0.52 mm. 



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

 U.S.N.M. 128918, 128919, 128920. 



Remarks: Swain (1952, p. 72) has recently de- 

 scribed the species and listed its occurrence in 

 North Carolina well samples as Black Creek and 

 lower. During the present study of outcrop and 

 well samples the species has not been recognized 

 in sediments older than the Peedee formation. 



Bairdoppilata postextensa (Swain) 

 Plate 3, Figures 5, 6, 9 



Bairdia postextensa Swain, 1948, Maryland Dept. 

 Geology, Mines and Water Res., Bull. 2, p. 193, 

 pi. 12, fig. 10. 

 Carapace subtriangular in side view; greatest 



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