Explanation of Plate 6 



Figs. 1-2 Sargentina asulcata Cooper, n. sp. Dorsum and left valve. Holotype, x30. Kinkaid 



formation, loc. 5 p. 39 



3-4 Paracavellina o^ata Cooper, n. sp. Dorsum and left valve. Holotype, x30. Menard 



formation, loc. 15 p. 37 



5-6 Paraca'vellina elliptica Cooper, n. sp. Dorsum and left valve. Genotype, x20. Gol- 



conda formation, loc. 17 p. 37 



7-8 Paracavellina pinguis Cooper, n. sp. Dorsum and left valve. Holotype, x30. Gol- 



conda formation, loc. 17 p. 38 



9-10 Sargentina crassimarginata Cooper, n. sp. Dorsum and left valve. Holotype, x30. 



Kinkaid formation, loc. 5 p. 39 



11-12 Sulcella o<vata Cooper, n. sp. Dorsum and left valve. Holotype, x30. Paint Creek 



formation, loc. 24 ... p. 39 



13-14 Sulcella nodocosta Cooper, n. sp. Dorsum and left valve. Holotype, x40. Paint 



Creek formation, loc. 24 p. 39 



15-16 Sulcella celsa Cooper, n. sp. Dorsum and left valve. Holotype, x30. Paint Creek 



formation, loc. 24 p. 39 



17-18 Paraca'vellina tumida Cooper, n. sp. Dorsum and left valve. Holotype, x30. Paint 



Creek formation, loc. 24 . p. 38 



19-22 Sargentina allani Coryell and Johnson. Dorsum and right valve of a female (19, 20) 



and a male (21, 22) topotypes, x30. Clore formation, loc. 27 p. 38 



23-25 CavelUna spatulata Croneis and Gutke. Dorsum, left valve, and posterior end, x30. 

 Renault formation, loc. 25 



26-27 Platychilus ovoides Cooper, n. sp. Dorsum and left valve. Genotype, x30. Vienna 



formation, loc. 10 p. 38 



28-30 Glytopleura alternata Croneis and Funkhouser. Dorsum, left valve, and posterior 

 end, x30. Kinkaid formation, loc. 3 



31-33 Glyptopleura al'vea Cooper, n. sp. Left valve, dorsum and posterior end. Holotype, 



x30. Kinkaid formation, loc. 5 p. 40 



34-35 Paraca'vellina opima Cooper, n. sp. Dorsum and left valve. Holotype, x30. Paint 



Creek formation, loc. 24 . . p. 37 



36-37 Cornigella golcondensis (Croneis and Gale). Left valve and dorsum, x40. Paint 



Creek formation, loc. 2 p. 39 



38 Glyptopleura bristoli Croneis and Gutke. Left valve, x30. Renault formation, loc. 25 p. 40 



39-41 Glyptopleura adunca Croneis and Thurman. Dorsum, left valve, and posterior 

 end, x30. Kinkaid formation, loc. 28 



42-44 Glyptopleura carrolli Croneis and Bristol. Dorsum, left valve, and posterior end, 

 x30. Menard formation, loc. 20 



45-47 Glyptopleura alata Croneis and Funkhouser. Anterior end, dorsum and left valve, 



x30. Clore formation, loc. 26 p. 40 



[79] 



