Plate 2 



Figures 



la-j,2. Fossocythcridea lenoirensis Swain and Brown, n. gen., n. sp., beds of 

 Washita age, DuPont water well No. 6, Lenoir County, North Carolina, 

 723-826 feet (lb, Id, le, If, lh, li, 2); Odom water well No. T-l, 

 Northampton County, North Carolina, 195-200 feet (lc, 1 j ) ; and 

 Greenville City water well, Pitt County, North Carolina, 608-654 feet 

 la, lg), x 43. 

 la. Interior of paratype female left valve, U.S.N.M. 132407 

 lb. Right side of male paratype, U.S.N.M. 132408 

 lc. Dorsal view of male paratype, U.S.N.M. 132409 

 Id. Right side of male paratype, U.S.N.M. 132410 

 le. Interior view of female paratype left valve, U.S.N.M. 132411 

 If. Right side of immature female paratype, U.S.N.M. 132412 

 lg. Right side of male paratype, U.S.N.M. 132413 

 lh. Exterior of female paratype right valve, U.S.N.M. 132414 

 li. Exterior of immature nodose right valve, U.S.N.M. 132415 

 lj. Dorsal view of female paratype, U.S.N.M. 132416 

 2. Interior of male paratype right valve, U.S.N.M. 132417 

 3a, b. Haplocytheridea lunarea Swain and Brown, n. sp., upper member Atkin- 

 son Formation, Coastal Petroleum Company's No. 1 Larsh well, Jeffer- 

 son County, Florida, 3,445-3,451 feet, x 45. 

 3a. Right side of holotype shell, U.S.N.M. 132418 

 3b. Dorsal view of paratype shell, U.S.N.M. 132419 

 4. Haplocytheridea multiclefta Swain and Brown, n. sp., beds of Washita 

 age, DuPont water well No. 6, Lenoir County, North Carolina, 733-743 

 feet, x 45. 

 Right side of holotype shell, U.S.N.M. 132420 

 5a-c. Clithrocytheridea halifaxensis Swain and Brown, n. sp., beds of Washita 

 age, Caledonia Prison Farm water well No. T-4, Halifax County, 

 North Carolina, 151-156 feet (5b) ; and Caledonia Prison Farm water 

 well No. T-2, Halifax County, North Carolina, 166-176 feet (5a), 

 241-246 feet (5c), x 45. 

 5a. Exterior view of paratype right valve, U.S.N.M. 132421 

 5b. Exterior of holotype left valve, U.S.N.M. 132422 

 5c. Interior of paratype left valve, U.S.N.M. 132423 



6. Dolocytheridea caledonensis Swain and Brown, n. sp., beds of Washita or 



Fredericksburg age, Caledonia Prison Farm water well No. T-4, Hali- 

 fax County, North Carolina, 236-241 feet, x 45. 

 Right side of holotype shell, U.S.N.M. 132424 

 7, 8a, b. Perissocytheridea odomensis Swain and Brown, n. sp., beds of Washita 

 age, Caledonia Prison Farm water well No. T-4, 141-146 feet (7), 

 Halifax County, North Carolina; and Odom water well No. T-l, 

 Northampton County, North Carolina, 190-195 feet (8a) and 195-200 

 feet (8b), x 45. 



7. Left side of paratype shell, U.S.N.M. 132425 



8a. Exterior of left valve questionably of this species, U.S.N.M. 132426 

 8b. Left side of holotype shell, U.S.N.M. 132427 

 9a-e. Schuleridea washitaeyisis (Alexander), lower member of Atkinson For- 

 mation, Humble Oil and Refining Company's No. 1 Bennett and Lang- 

 dale well, Echols County, Georgia, 3,700-3,710 feet, x 43. 

 9a. Interior of left valve, U.S.N.M. 132428 

 9b, c,d. Right sides of three shells, U.S.N.M. 132429, 132430, 132431 

 9e. Interior of right valve, U.S.N.M. 132432 

 lOa-f. Eucythere semiglypta Swain and Brown, n. sp., beds of Washita age, 

 Caledonia Prison Farm water well No. T-2, 176-181 feet (lOe) and 

 191-196 feet (10a,b,f) Halifax County, North Carolina and No. T-4, 

 161-166 feet (10c) and 241-246 feet (19d), x 45. 

 10a. Exterior of holotype left valve, U.S.N.M. 132438 

 10b. Exterior of small paratype left valve, U.S.N.M. 132439 

 10c. Interior of paratype right valve, U.S.N.M. 132440 

 lOd. Right side of paratype shell, U.S.N.M. 132441 

 lOe. Exterior of paratype right valve, U.S.N.M. 132442 

 lOf. Interior of paratype right valve, U.S.N.M. 132443 



47 



