BRACHIOPODA. 
97 
Terebratula pectiniformis. Buck, Ter. p. 65. t. 3. f. 31. 
Broun, Letk. p. 652. t. 30. f. 5. 
Rcemer, Kreid. p. 41. 
Quenst. Handb. p. 463. t. 37. f. 14 (not 12, 13). 
Terebratula Hilseana, Rcemer, Ool. ii. p. 20. t. 18. f. 9 ; Kr. p. 41 . 
Fossil. U. Chalk. Maestricht. 
3. Trigonosemus Palissii. B.M. 
Shell orbicular, depressed, radiately plaited ; jilaits numerous, 
intercalating ; margins crenulated ; dorsal valve slightly concave, 
sinuated in front ; hinge-line curved, narrower than the shell ; 
cardinal process prominent ; loop doubly attached ; ventral valve 
convex ; beak prominent, curved, with a minute apical foramen ; 
hinge-area large, triangular, concave, sharply bordered; deltidium 
large, triangular, flat. Lon. 7i, lat. 7, alt. 3 lines. 
Terebratella Palissii, Woodward, 1852, Mus. Brit. 
Trigonosemus pulchellus (not Nilsson), Dav. Ann. Nat. Hist. 
June 1850, pi. 15. f. 4 (incorrect). 
Terebratula pulehella (part.), Quenst. Handb. t. 37. f. 12, 13? 
Fossil. Upper Chalk. Ciply, Belgium. 
4. Trigonosemus pulchellus. B.M. 
Shell suborbicular, depressed, radiately plaited ; plaits inter- 
calating ; dorsal valve slightly concave, truncate^ at the hinge- 
line ; ventral valve convex, with a prominent, incurved and sharp- 
edged beak; hinge-area large, triangular, concave; foramen apical, 
minute ; deltidium large, triangular, flat ; loop elongated, re- 
flected, attached to a septum which reaches the opposite valve. 
Lon. 7, lat. 6, alt. 2 lines. 
Terebratula pulehella, Nilsson, 1827, Petref. Sues. p. 36. pi. 3. 
f. 14. 
Rcemer, Kreid. p. 41, 
Dalman, Vet. Akad. p. 138. 
Fossil. Upper Chalk. Sweden. 
5. Trigonosemus incertus. 
Shell elongated, oval, striated ; valves almost equally convex ; 
beak produced, rounded, moderately recurved ; area triangular, 
nearly flat, short ; foramen small, oval ; deltidinm bordering a 
small portion of the foramen; striae about 34, frequently 
intercalated, and decussated by numerous, fine, concentric lines 
of growth. Lon. 4i, lat. 4, alt. 24 hnes. 
Trigonosemus incertus, Davidson, Mon. Cret. p. 31. pi. 4. f. 5. 
Fossil. Lower Chalk {Craie chloriUe). Chard, Somerset. 
F 
