County, Texas, and less abundant in the DeQueen 

 Limestone of Arkansas. 



Paracypris cf. P. angusta Alexander 



Plate 4, Figures 2a, b 



Paracypris angusta Alexander, 1929, Univ. Texas 

 Bull. 2907, p. 67, pi. 4, figs. 3, 7. Howe and 

 Laurencich, 1958, Introd. Study Cretaceous 

 Ostracoda, p. 446, text fig. 



? Paracypris aff. P. angusta Alexander. Swain, 

 1948, Maryland Dept. Geol., Mines and Water 

 Res., Bull. 2, p. 192, pi. 12, fig. 6. 



Shell elongate, subreniform-lanceolate in side 

 view, highest medially; dorsal margin moderately 

 convex, sloping more steeply behind than in front 

 of position of greatest height; ventral margin 

 concave medially; anterior margin uniformly 

 rounded ; posterior margin acuminate and strongly 

 extended below. Left valve larger than right over- 

 lapping and overreaching right around most if not 

 all of periphery. Valves compressed, greatest con- 

 vexity median. Surface smooth. 



Length of figured specimen (PL 4, Fig. 2b) 0.86 

 mm, height 0.37 mm, convexity 0.20 mm. 



Remarks. — The greater elongation, posterior 

 acumination and ventral concavity distinguish 

 this form from P. weatherfordensis Vanderpool 

 v/ith which it is associated and with which it was 

 identified by Vanderpool. The present specimens 

 are somewhat less acuminate posteriorly than typ- 

 ical P. angusta, as illustrated by Alexander, but 

 are close to hypotype specimens in the U. S. iden- 

 tified by Alexander. The shape and overlap are 

 closely similar to those of P. angusta Alexander 

 from the Taylor Marl of northeastern Texas. 



Occurrence. — Vanderpool's specimens were ob- 

 tained from the Glen Rose Formation, west of 

 Weatherford, Parker County, Texas. The form 

 identified as P. aff. angusta from the subsurface 

 of Maryland may be a different species, as it is 

 less elongate and with truncated dorsal slopes. 



Family Ilyocyprididae Kaufmann, 1900 



Subfamily Cyprideinae Martin, 1940 



Genus Cypridea Bosquet, 1852 



Cypridea dequeenensis Swain and Brown, n. sp. 



Plate 4, Figure 8; Plate 5, Figures 3a-c 

 Text Figures 3c, 4a 



Cypridea ventrosa var. bispinosus Vanderpool, 



1928, Jour. Paleont., v. 2, p. 104, pi. 14, figs. 1, 2. 



? Cypridea cf. ventrosa bispinosus (Jones). Cal- 



ahan, 1939, Shreveport Geol. Soc. Guidebook 



14th Annual Field Trip, p. 5, pi. 8, figs. 9a, b. 



not Cypridea bispinosa Jones, 1878, Geol. Mag., 



Dec. 2, v. 5, p. 109, pi. 3, figs. 9, 10. 

 not Cypridea bispinosa Galeeva, 1955, Cretaceous 

 Ostracod Succession of Mongolian Peoples Re- 

 public p. 36, fig. la-g. Lubimova, 1956, VNIGRI, 

 Trans., N. S., No. 93, p. 25, pi. 5, fig. 2a, b, 3a, 

 b, 4 (fide) Howe and Laurencich, 1958, p. 119. 

 Cypridea kleinbergi Galeeva, 1955, op. cit., p. 31, 

 pi. 8, figs. 2a-e (=C. bispinosa Galeeva by Howe 

 and Laurencich, 1958) 



Shell subtrapezoidal in side view, highest about 

 one-fourth from anterior end; hinge margin 

 nearly straight except for projecting spines, about 

 five-sevenths of shell length, obtuse cardinal 

 angles, the anterior sharper but somewhat smaller 

 than posterior; ventral margin slightly convex, 

 converging posteriorly with dorsum and with well 

 defined but shallow notch near anteroventral mar- 

 ginal bend ; anterior margin with broad curvature, 

 extended medially, truncated above; posterior 

 margin narrower but also with broad curvature, 

 extended flangelike along posteroventral marginal 

 bend. Left valve larger than right, overlapping 

 and extending beyond right terminally and ven- 

 trally; dorsally, right valve extends slightly be- 

 yond edge of left. Valves compressed, most convex 

 posteromedially. 



Anteroventral submarginal portion of each 

 valve bears a prominent hood, projecting beak, 

 and postjacent furrow which terminates in margi- 

 nal notch. A large spine projects from surface at 

 midheight, about one-half from posterior end ; a 

 second large spine projects beyond dorsal margin 

 from a position dorsal of preceding spine. General 

 valve surface coarsely and densely pitted, and 

 with numerous small spines scattered over sur- 

 face. 



Hinge surface of right valve consists of long 

 rabbet-groove and terminal triangular-shaped 

 toothlike elevations; hinge of left valve has cor- 

 responding rabbet-groove surface and terminal 

 triangular-shaped depressions over which fits 

 groove in right valve. Inner lamellae rather nar- 

 row, with slight vestibule developed terminoven- 

 trally. Pore canals and muscle scar not observed 

 because of recrystallization of shell material. 



Length of holotype left valve (PI. 4, Fig. 8) 

 0.93 mm, height 0.60 mm, convexity of valve 0.30 

 mm, excluding large spines. 



Relationships. — A new name is required for 



15 



