76 brachiopoda. 



70. Waldheimia Seatoniana. 

 Shell i-esembling 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 gro^rth, 

 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. 4^, alt. 3 lines. 



Terebratula subangusta, M'unst. 1841, Beitr. iv. p. 64. pi. 6. f. 16. 



B'Orh. Prod. i. p. 204. 

 Terebratula pra;marginata, 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 sUghtly 

 convex, impressed in the middle in front ; margins even ; beak 

 rounded, recurved ; foramen small. Lon. 5, lat. 3, alt. 2^ hnes. 



Terebratula angusta, Schl. 1820, Petref. p. 285. 



Buch, Mem. Soc*Geol. Fr. lii. p. 217. pi. 20. f. 80. 



Dunker Sf Meyer, Palceont. p. 285. pi. 34. f. 1-4. 



D'Orb. 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, with 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. 

 Hemithyris navicula, M' Coy, Pal. Foss. p. 204. 

 Fossil. Upper Silurian*. England; Germany. 



* Nearly all the Silurian " Terebratulaj " have been ascertained to 

 possess calcareous spires and naust therefore be removed from the 

 familv. 



