76 
BRACHIOPODA. 
70. Waldheimia Seatoniana. 
Shell resembling T. pala. 
Terebratula Seatoniana, Portlock, 1844, Proc. Geol. Soc. p. 357- 
Fossil. Jurassic ? limestone. Corfu. 
71. Waldheimia subangusta. B.M. 
Shell small, oval, smooth, with a few' strong lines of grow'tb, 
punctate ; dorsal valve circular, nearly fiat, with a medio-longi- 
tudinal furrow, and indications of an internal median septum; 
ventral valve convex ; beak prominent, rounded, recurved, trun- 
cated by a small foramen. Lon. 5|, lat. alt. 3 lines. 
Terebratula subangusta, Munst. 1841, Seitr. iv. p. 64. pi. 6. f. 16. 
D’Orb. Prod. i. p. 204. 
Terebratula preemarginata, Klipst. 1844, p. 222. pi. 15. f. 6. 
D’Orb. Prod. i. p. 204. 
Fossil. Trias. Tyrol. 
72. Waldheimia angusta. 
Shell small, elongated, oval, smooth ; dorsal valve slightly 
convex, impressed in the middle in front ; margins even ; beak 
rounded, recurved ; foramen small. Lon. 5, lat. 3, alt. 2^ Unes. 
Terebratula angusta, Schl. 1820, Petref. p. 285. 
Buch, Mem. Soc. Geol. Fr. hi. p. 217. ph 20. f. 80. 
Dunker Meyer, Paleeont. p. 285. pi. 34. f. \-A. 
D’Orh. Prod. i. p. 177- 
Fossil. Muschelkalk, Silesia. 
73. Waldheimia? navicula. B.M. 
Shell oval, boat-shaped, smooth ; dorsal valve concave, raised 
at the sides, depressed in front, with a prominent longitudinal 
septum inside ; ventral valve convex, w'ith a very prominent, ob- 
tuse, longitudinal ridge ; beak prominent, closely recurved ; fora- 
men minute, complete ; muscular impressions deep. Lon. 6, 
lat. 4, alt. 4 lines. 
Terebratula navicula, J. Sow. 1839, in Murch. Silur. Syst. p. 611. 
pi. 5.f. 17. 
Barrande, Silur. Bbhm. p. 46. pi. 15. f. 4. 
D’Orb. Prod. i. p. 43. 
Ilemithyris navicula, M‘Coy, Pal. Foss. p. 204. 
Fossil. Upper Silurian*. England ; Germany. 
* Nearly all the Silurian “ Terebratute ” have been ascertained to 
possess calcareous spires and must therefore be removed from the 
family. 
