EXPLANATION OF PLATE LXXXII. 



Figs. 1-10. COMPOSITA SULCATA n. sp p. 490 



1-5. Pedicle, brachial, lateral, posterior and anterior views of a 

 nearly complete specimen. 6-10. Anterior, posterior, brachial, 

 lateral and pedicle views of a smaller example. Cotypes. 

 (W. M., No. 13782.) 



Chester Group, Mcadc County, Kentucky. 



Figs. 11-13. COMPOSITA OPPOSITA (White and Whitfield) p. 494 



Pedicle, brachial and lateral views of the holotype. (A. M. N. H., 

 No. 5000-1.) 



Upper Kinderhook, Burlington, Iowa. 



Figs. 14-20. COMPOSITA L^VIS n. sp p. 491 



14-17. Pedicle, brachial, lateral and posterior views of a very per- 

 fect specimen. 18-20. Pedicle, brachial and anterior views of 

 another specimen. Cotypes. (D. K. G., No. 303.) 

 Chester Group, Breckinridgc Co., Kentucky. 



Figs. 21-26. COMPOSITA GLOBOSA n. sp p. 493 



21-23. Pedicle, lateral and anterior views of a nearly perfect speci- 

 men. 24-26. Brachial, posterior and anterior views of another 

 specimen. Cotypes. (W. M., No. 3003.) 



Keokuk limestone, near Springfield, Missouri. 



Figs. 27-38. NUCLEOSPIRA BARRISI White p. 455 



27-31. Pedicle, brachial, posterior, anterior and lateral views of a 

 nearly complete specimen. 32-33. Exterior and interior views 

 of a pedicle valve. 34-35. Exterior and interior views of an- 

 other pedicle valve. 36. View of a pedicle valve. 37. View of 

 a brachial valve. 38. Interior view of an imperfect brachial 

 valve. Cotypes. (U. M., No. 1360.) 



Kinderhook, Bed No. 7, Burlington, Iowa. 



Figs. 39-42. NUCLEOSPIRA OBESA Rowley p. 457 



39-41. Pedicle, brachial and lateral views of a metatype. 42. 

 Brachial view of the same specimen enlarged (x3). (R. R. 



R.) 



Burlington white chert, Louisiana, Missouri. 



Figs. 43-48. NUCLEOSPIRA ROWLEYI n. sp p. 454 



43-44, 45-46, 47-48. Pedicle and brachial views of three different 

 individuals, enlarged (x 4). Cotypes. (W. M., No. 6733. 

 Louisiana limestone, Louisiana, Missouri. 



Figs. 49-60. NUCLEOSPIRA MINIMA Weller p. 456 



49-54. Views of six separate valves. 55-60. Views of the same 

 valves enlarged (x4). Cotypes. (W. M., No. 11349.) 

 Glen Park limestone, Glen Park, Missouri. 



Figs. 61-63. CAMAROPHORELLA LENTICULARIS (White and Whitfield) .. .p. 459 

 61. View of an internal cast of a pedicle valve. 62-63. Views of 

 two internal casts of brachial valves. Cotypes. (U. M., No. 1356.) 

 Kinderhook, Bed No. 5, Burlington, Iowa. 



183 



