46 beachiopoda. 



105. Terebratula sacculus. B.M. 



Shell oblong, \^'ith a straight or emarginate front, whicli is 

 sometimes elevated, and almost always defined by two broad, 

 obtuse ridges, proceeding a short distance on the shell, on each 

 side of a mesial broad shallow groove ; beak prominent, incm-ved. 



Anomites sacculus, Martin, 1809, Petref. t. 46. f. 1, 2. 

 Terebratula sacculus, Koninck, Descr. p. 293. pi. 20. f. 3. 



D'Ori. Pro(/. i. p. 151. 

 Fossil. Carb. Britain; Belgium; Russia. 



106. Terebratula hastata. B.M. 



Shell elliptical, subrhomboidal, rather depressed ; front trim- 

 cated and indented ; edges sharp ; beak thick, shghtly recurved ; 

 foramen small ; loop short, simple. Lon. 19, lat. 15, alt. 11 

 lines. 



Terebratula hastata, Soio. 1824, Min. Con. v. p. 66. t. 446. f. 2, 3. 



Phil. Geol. Yorks. ii. pi. 12. f. 1 ; Pal. Foss. p. 91. pi. 35. 

 f. 168?. 



Roemer, Nordd. Ool. p. 48. 

 Fossil. Carb. Britain; Belgium. 



107. Terebratula fusiformis. 



Shell smooth, much elongated, fusiform, inflated, contracted 

 at each end ; valves equally convex ; margins even ; beak pointed, 

 recurved; foramen small, apical?; deltidium distinct?. Lon. 10, 

 lat. 5i, alt. 4 hues. 



Terebratula fusiformis. Vera. 1845, Russ. p. 65. pi. 9. f. 8. 



D'Orb. Prod. i. p. 151. 

 Fossil. Carb. Russia. 



108. Terebratula? lacryma. 



Shell subglobose, smooth, oblong ; front straight, or slightly 

 waved, scarcely raised except at the edge, which is deeply si- 

 nuated by the projection of the inferior valve, the central furrow 

 of which is broad, flat, and bounded by two sharpish ridges ; 

 beak not prominent. Lon. 5, lat. 4i, alt. 4 hues. 



Atr\-pa lacryma. Sow. Geol. Trans. 2nd ser. v. pi. 56. f. 9. 

 Fossil. Devonian. England. 



109. Terebratula? juvenis. B.M. 



" Shell broad ovate, depressed, smooth, contracted toward the 

 front ; larger valve remarkably inciu-ved at the minute, laterally 

 angulated beak. In full-grown specimens the side margins are 



