BRACHIOPODA. 
// 
74. WaLDHEIMIA ? UMBRA. 
Shell orbicular, depressed, slightly truneated in front, smooth ; 
dorsal valve with a deep longitudinal furrow becoming wider in 
front ; margins evenly sinuated ; ventral valve with an obtuse 
longitudinal ridge ; beak very small, recmwed. Lon. and lat. 7, 
alt. 3 hnes. 
Terebratula umbra, Barrande, 1847, in Haidinger’s Abhandl. 
p.401. t. 17. f. 3. 
Atiypa umbra, D’Orb. Prod. i. p. 38. 
Fossil. U. Silurian. Bohemia. 
75. Waldheimia? upsilon. B.M. 
Shell subpentagonal, truncated and indented in front, ventri- 
cose, smooth ; margins even, slightly arched in front ; edges 
thick, rounded; valves equally convex, each with two rounded 
ridges, separated by a shallow sinus, in front ; beak small, late- 
rally compressed, recurved. Lon. 11, lat. 10, alt. 7 lines. 
Terebratula upsilon, Barrande, 1847, in Haidinger’s Abhandl. 
p. 405. t. 15. f. 9. 
Atrypa? upsilon, D’Orb. Prod. i. p. 40. 
Hemithyris upsilon, M‘Cog, Pal. Foss. p. 207- 
Fossil. U. Silurian. Bohemia ; Wales. 
76. Waldheimia? Juno. 
Shell oval, uddely truncated in front, depressed, smooth ; mar- 
gins even ; valves equally convex, shghtly sinuated in front ; 
beak small, compressed. Lon. 8, lat. 7, alt. 4 lines. 
Terebratula Juno, Barrande, 1847, in Haidinger’s Abhandl. 
p. 407. t. 15. f. 10. 
Atrypa Juno, D’Orb. Prod. i. p. 40. 
Fossil. U. Silurian. Bohemia. 
77. Waldheimia? canalis. 
Shell oval or orbicular, smooth ; both valves with a deep medio- 
longitudinal furrow ; margins even, deeply indented in front ; 
beak small, recurved. Lon. 6, lat. 4^ hnes. 
Terebratula canalis, J. Sowerby, 1839, in Murch. Silur. Syst. 
p. 611. t. 5. f. 18. 
Barr. Silur. Bohm. p. 410. t. 16. f. 13. 
Atrypa canalis, D’Orb. Prod. i.p. 40. 
Fossil. U. Silurian. England ; Bohemia. 
