120 
BRACHIOPODA. 
Thecidium curvirostre, Sow. Genera, f. 4, 5. 
Desk. ed. Lam. vii. p. 349. 
Fossil. U. Chalk. France. 
'5. Thecidium hippocrepis. B.M. 
Shell ovate-orbicular, smooth, attached by the truncated 
umbo ; dorsal valve concave ; interior with broad striated mar- 
gin, impressions curved, slightly digitated on their inner sides, 
separated by a wide space. Lon. 3^, lat. 3 lines. 
Thecidea hippocrepis, Goldfuss, Petr. ii. p. 289. t. 161. f. 4. 
D’Orb. Prod. ii. p. 260. 
Thecidea vermicularis, Broun, Index, p. 1267. 
Terebratuhtes vermicularis, Schl. Taschb. 1813, vii. 1. 113. 
? Thecidea prisca, Munster MS. Jura, Thurnau. 
Fossil. Chalk. Maestricht; Essen. 
6. Thecidium hieroglyphicum. B.M. 
Shell ovate-orbicular, smooth, attached by the truncated apex 
of the produced umbo ; interior of ventral valve exhibiting two 
reniform vascular impressions in front of the retractor scars; 
dorsal valve flat; intenially with a broad striated border; bra- 
chial impression palmate, 6-lobed, converging. Lon. 5, lat. 4i 
lines. 
Thecidea hieroglyphica, Defrance, Diet. Sc. Nat. liii. 435. 
Gold/. Petr. ii. p. 290. t. 161. f. 6. 
Terebratula hieroglyphica, Kefst. Natg. ii. p. 680. 
Thecidium pumilum, G. Sow. Genera of Shells, f. 1, 2 (not Ter. 
pumila, Lamk.). 
Fossil. Chalk. Maestricht. 
7. Thecidium digitatum. B.M. 
Shell irregular, smooth, attached by the truncated apex of the 
ventral valve ; cavity of the ventral valve striated; retractor im- 
pressions large, deep and smooth ; dorsal valve transversely oval, 
with a wide hinge-line ; internally with a broad margin, and two 
diverging, symmetrical, palmated and 5-lobed impressions. Lon. 
5, lat. 6 lines. 
Thecidium digitatum, G. Sowerby, Genera, no. 20. f. 3. 
Thecidea digitata, Broun, Lethcea, p. 664. t. 30. f. 4. 
Gold/. Petr. ii. p. 290. t. 161. f. 6. 
Thecidea Essensis, Rcemer, Kreid. p. 36. 
D’Orb. Prod. ii. p. 173. 
Fossil. U. Greensand. Westphaha. 
