modation groove dorsad of the interterminal area, 

 whereas species are given as Cytheridea (Clithro- 

 cytheridea) if the accommodation groove and at- 

 tendant valve overlap relationships are absent. 



Subgenus Haplocytheridea Stephenson, 1936 



Cytheridea (Haplocytheridea) fabaformis 



( Berry ) 



Plate 2, Figures 7, 8 



Cytherella fabaformis Berry, 1925, Am. Jour. 



Sci., 5th ser., vol. 9, p. 487, fig. 13. 

 Cytheridea fabaformis Alexander, 1929, Texas 

 Univ. Bull. 2907, p. 76, pi. 5, fig. 18. 

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

 p. 224. 

 Haplocytheridea ? fabaformis (Berry) , 

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

 p. 426, pi. 62, fig. 23, text fig. 2e. 

 Haplocytheridea ? fabaformis var. multilira 

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

 p. 426, pi. 62, figs. 25, 26. 

 Dimensions : Fig. 7 : female ; length 0.60 mm ; 

 height 0.34 mm. 



Fig. 8 : male ; length 0.64 mm ; 

 height 0.30 mm. 



Occurrence: Peedee only, localities A, B, C, D, 

 E, and F. U.S.N.M. 128966, 128967. 



Remarks: North Carolina specimens are iden- 

 tical with those specimens occurring in the Mon- 

 mouth formation and originally described by 

 Berry, 1925. A variety H. ? fabaformis multilira 

 Schmidt was described by Schmidt, 1948. Exam- 

 ination has shown the species and variety to re- 

 flect only minor differences and the two are con- 

 sidered to be conspecific by the writer. 



Cytheridea (Haplocytheridea) sarectaensis 

 Brown, n. sp. 



Plate 7, Figures 1-3 



Shell in side view, oblong-ovate; highest medi- 

 ally; dorsal margin convex; ventral margin 

 straight ; anterior broadly rounded with about ten 

 short spines, most pronounced ventrally ; posterior 

 margin obliquely rounded, slightly extended ven- 

 trally, with about seven short spines along postero- 

 ventral margin. 



Surface of valves strongly pitted, puncta ar- 

 ranged in about nine subvertical rows separated 

 by short rounded ridges, in the anterior and me- 

 dian two-thirds of valve ; furrows most pro- 

 nounced medio-dorsally, incipient furrows extend 

 to a rounded steep posterior slope ; anterior fourth 



rounded, slopes steeply to wide slanting anterior 

 margin. Anterior and posterior thirds, ventrally, 

 with a slight bulbous protrudance. Internal fea- 

 tures those of the genus. 



Dimensions : Holotype : length 0.75 mm ; height 

 0.40 mm; biconvexity 0.38 mm. 



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

 128968, 128969, 128970. 



Remarks: This species belongs to the large 

 group which includes Cytheridea (H.) moodyi, 

 Cytheridea (H.) veatchi, Cytheridea (H.) veatchi 

 aquia, and Cytheridea (H.) ruginosa. The present 

 specimens are closest to C. ruginosa Alexander 

 in ornamentation. They are higher anteriorly and 

 posteriorly with steeper posterior and anterior 

 slopes than that species, and more tumid in lateral 

 view. Female dimorphs are shorter and more 

 tumid than the males. 



Cytheridea (Haplocytheridea) councilli 

 Brown, n. sp. 



Plate 2, Figures 12-16 



Carapace in side view, elongate-ovate; highest 

 post-median, widest behind anterior cardinal 

 angle ; dorsal margin convex ; ventral margin 

 straight to slightly sinuous ; anterior margin 

 rounded, obtuse dorsally; ventral margin less 

 evenly rounded, weakly acuminate ventrally. Left 

 valve larger than right except along anterior mar- 

 gin, overlap greatest along postero-ventral third. 



Entire carapace very coarsely and evenly pit- 

 ted, deepest pits (about six) are behind and paral- 

 lel to the anterior margin. Viewed ventrally the 

 anterior margin on both valves is weakly rimmed 

 below. 



Hinge of right valve consists of terminal 

 notched cusps connected by a narrow crenulate 

 bar postjacent to the dorsal margin. The left valve 

 bears narrow notched sockets connected by a 

 narrow crenulate groove, separated from dorsal 

 margin by a very weakly grooved shelf. Muscula- 

 ture that of the genus. 



Dimensions: Holotype: length 0.59 mm; height 

 0.26 mm; biconvexity 0.21 mm. 



Occurrence : Peedee only, localities A, B, D, and 

 F. U.S.N.M. 128971, 128972, 128973, 128974, 

 128975. 



Remarks: The coarsely pitted surface and 

 rimmed anterior margin serves to distinguish this 

 species. Named for Richard Councill, geologist, 

 Atlantic Coast Line Railroad. 



17 



