PLATE III. 
Fig, 37. Cyrtoceras cinctutus. A, lateral view. B, dorsal view. Clifton, 
Tennessee. Osgood bed. 
Fig, 38. Hyolithus cliftonensis. A, Ventral view. B, Dorsal view. Clifton, 
Tennessee, Osgood bed. 
Fig. 39. Triplecia (Cliftonia) tenax. Clifton, Tennessee. Osgood bed. 
Fig. 40. Platyceras pronum. View of upper side. Clifton, Tennessee. Os- 
good bed. 
Fig. 41. Diaphorostoma cliftonensis. A, side view. B, view showing aper- 
ture. Clifton, Tennessee. Osgood bed. 
Fig. 42. Triplecia (Cliftonia) striata. A, brachial valve. B, pedicel valve. 
Clifton, Tennessee. Clinton bed. 
Fig. 43. Orthis flabellites. Brachial valve. New Marion, Indiana. Osgood 
bed. 
Fig. 44. Orthis interplicata. Brachial valve. New Marion, Indiana. Os- 
good bed. 
Fig. 45. Hebertella (Schizonema) fissistriata. A, brachial valve. B, interior 
of brachial valve. New Marion, Indiana, Osgood bed. 
Fig. 46. Rhynchotreta simplex. A, pedicel valve. B, brachial valve. Clif- 
ton, Tennessee. Clinton bed. 
Fig. 47. Rhynchonella (Stegerhynchus) whitii-praecursor. A, B, brachial 
valves. C, pedicel valve. Clifton, Tennessee. Clinton bed. 
Fig. 48. Rhynchonella (Stegerhynchus) neglecta-cliftonensis. T, brachial 
valve. B, pedicel valve. C, anterior view. Clifton, Tennessee. Clinton bed. 
Fig. 49. Wilsonia saffordi. Lateral view, with the pedicel valve on the right. 
Brownsport Furnace, Tennessee, Brownsport bed. 
Fig. 50. Uncinulusschucherti. Lateral view. Ferryville, Tennessee. Linden 
bed. 
Fig. 51 A, B. Gypidula simplex. T, pedicel valve. . 5 , view from side of bra- 
chial valve. Newsom, Tennessee. Waldron bed. 
Fig. 51 C. Gypidula roemeri. Pedicel valve. Newsom, Tennessee. Wal- 
dron bed. 
Fig. 52, Chonostrophia lindenensis. Pedicel valve. Pyburn bluff, Tennessee. 
Linden bed. 
Fig. 53. Hebertella celsa. T, Interior of brachial valve. B, view from side 
of pedicel valve. Perryville, Tennessee. Linden bed. 
Fig, 54, Hebertella (Schizonema) fissiplica. A, B, brachial valves. C, D, 
interiors of brachial valves. E, interior of pedicel valve. Dixon Spring, Ten- 
nessee. Brownsport bed. 
Fig. 55. Pachypora (Platyaxum .^) planostiolata. Upper surface, showing the 
apertures of the corallites. Pegram, Tennessee. Brownsport bed. 
Fig. 56. Alveolites inornatus. Upper surface. A mile and a half east of Lin- 
den. Tennessee. Brownsport, bed. 
Fig. 57. Pachypora (Platyaxum) pegramensis. Part of a frond, with the bro- 
ken edge along the lower side of the figure. Pegram, Tennessee. Brownsport 
bed. 
Fig. 58. Heliophyllum pegramensis. A, Calyx. B, side view. Pegram, 
Tennessee. Brownsport bed. 
