Grayson Formations of Texas (Alexander, 1929, 

 p. 65). 



Occurrence. — Lower member of Atkinson For- 

 mation, Humble Oil and Refining Company's No. 

 1 Bennett and Langdale well, Echols County, 

 Georgia, core sample 3,700-3,710 feet. 



Paracypris alta Alexander 

 Plate 1, Figures 8a, b 



Paracypris alta Alexander, 1929, Univ. Texas 



Bull. 2907, p. 66, pi. 3, fig. 9, 12. 



Howe and Laurencich, 1958, Introd. to Study 

 of Cretaceous Ostracoda, p. 446, text fig. 



Shell elongate-acuminate in side view, highest 

 three-eighths to one-half of distance from anterior 

 end ; dorsal margin moderately convex, truncated 

 anterior to greatest height ; ventral margin gently 

 concave ; anterior margin rounded, slightly ex- 

 tended below ; posterior margin very strongly ex- 

 tended and acuminately pointed ventral to mid- 

 height. Left valve larger than right overlapping 

 and extending beyond the other along ventral and 

 anterodorsal margins. Valves compressed, thick- 

 est medially to anteromedially. Internal features 

 not observed. 



Length of a figured specimen (PI. 1, Fig. 8a), 

 that perhaps is incomplete along anterior margin, 

 0.80 mm, height 0.33 mm, convexity 0.37 mm. 



Remarks. — This species can be distinguished 

 from P. siliqua Jones and Hinde (1890, p. 2) by 

 the more pronounced truncation of the antero- 

 dorsal marginal slope ; in P. siliqua the mid-dorsal 

 region and the posterodorsal slope tend to be 

 truncated. 



Occurrence. — Lower member of Atkinson For- 

 mation. Sun Oil Company No. 1 Westbury well, 

 Putnam County, Florida, core sample 3,834-3,838 

 feet. 



Paracypris sp. 



Plate 1, Figure 9a, b 



Shell elongate, subacuminate in side view, 

 highest about three-sevenths from anterior end; 

 dorsal margin moderately and nearly uniformly 

 convex; ventral margin nearly straight, very 

 slightly concave medially ; anterior margin 

 rounded, with greatest extension at or slightly 

 ventral to midheight; posterior margin narrowly 

 rounded, subacuminate, strongly extended below 

 midheight. Left valve larger than right, extending 

 most noticeably beyond the other along ventral 



and anterodorsal margins. Surface smooth. Inter- 

 nal features not observed. 



Length of a figured specimen (PI. 1, Fig. 9a) 

 0.66 mm, height 0.29 mm, convexity 0.22 mm. 



Remarks. — Representatives of this form occur 

 with Paracypris alta Alexander in one of the 

 wells, and may represent either dimorphs or 

 immature molts of that species, rather than a 

 distinct species. The generally larger size, more 

 extended and acuminate posterior end and trun- 

 cated dorsal margin of P. siliqua Jones and Hinde 

 distinguish the present specimens from that spe- 

 cies. 



Occurrence. — Lower member of Atkinson For- 

 mation, Humble Oil and Refining Company, No. 1 

 Bennett and Langdale well, Echols County, Geor- 

 gia, core 3,700-3,710 feet. 



Paracypris weatherfordensis Vanderpool 



Plate 4, Figures la, b 



Paracypris weatherfordensis Vanderpool, 1928, 

 Jour. Paleont., v. 2, p. 104, pi. 14, figs. 11, 12. 

 Howe and Laurencich, 1958, Introd. Study Cre- 

 taceous Ostracoda, p. 451, text fig. 



Shell elongate, sublanceolate in side view, 

 highest medially; dorsal margin moderately con- 

 vex, with truncated anterior slope ; ventral margin 

 nearly straight, slightly sinuous; anterior margin 

 nearly uniformly rounded; posterior margin 

 bluntly acuminate, strongly extended below. 

 Valves unequal, the left overlapping and extend- 

 ing beyond right except anteroventrally, where 

 overreach is slight or lacking; anterodorsally, a 

 small flaplike extension of left valve results in 

 slightly greater overlap than elsewhere, a similar 

 but weaker flap occurs on anterodorsal slope. 

 Valves compressed, greatest convexity median. 

 Surface smooth. Internal features could not be 

 observed clearly in the type specimens. 



Length of holotype (PI. 4, Fig. lb) 0.81 mm, 

 height 0.35 mm, convexity 0.25 mm. (specimen 

 partly crushed). 



Remarks. — Several of the specimens of the 

 type collection are more elongate than the meas- 

 ured specimen cited by Vanderpool, and have con- 

 cave venters. These are here referred, tentatively, 

 to P. angusta Alexander (1929, p. 67). 



Occurrence. — Vanderpool reported the species 

 to be abundant in certain clay beds in the Glen 

 Rose Formation west of Weatherford, Parker 



14 



