hraciiioi'oda. 29 



40. Terebratula Cartekoniana. 



S/icll roiiiKlly iiii^iiliiti'd, voiitrioosp, sinootli ; iniirpiiis hisiiui- 

 nti'd ; Ix'iik conlracti'il, slij;litl\ cuixi'd ; rinimifii xinall, round ; 

 dc'ltidiiiin iiiconsj)icn<ms ; dorsal vidvo with two small, elevated 

 folds ill front. Loii. l.'<. Int. 12, alt. 11 lines. 



Tcn-l)ratula Carteroniana, D'O/i. Ter. Crp/.iv.p.SO.t.SOr.f. 1-5; 



Prod. 2. p. 85. 

 Fossil. Neocomian. France. 



41. TeREBRATULA ARABILI.S. 



iS7u'// suhorbicnlar, dt'prossed, concentrically ))l()titrlied with 

 numerous rcj^ular shallow furrows ; front margins obscurely bi- 

 sinuated ; lieak recurved, truncated by a large foramen. Lon. 16, 

 lat. 14, alt. 7 lines. 



Terebratula arabilis, Forbes, 1846, Trans. Geol, Soc. vii. pt. 3. 

 p. 1:^8. pi. 18. f. 12. 

 D'OrA. Prof/. ii. p. 258. 

 Fossil. Chalk. S. India. 



42. Terebratula Inca. B.M. 



Shell orbicular, depressed, smooth ; lines of growth very ob- 

 scure, except near the margin ; valves nearly equally convex, 

 slightly Insinuated in front ; beak short, recurved, obscurely 

 keeled at the sides ; foramen large and circular ; deltidium wide 

 and short. Lon. 21, lat. 20^, alt. 12 lines. 



Terebratula Inca, Forbes, 1846, in Darwin's Geol. S. Amer. p. 268. 



pi. 5. f. VJ, 20. 

 Fossil. Cretaceous limestone. Iquique, Peru. 



43. Terebratula longa. B.M. 



Shell elongated, elliptical, smooth ; margins even, slightlv 

 elevated in front ; dorsal valve (le])ressc(l, pointed at the umbo, 

 slightly truncated in front ; ventral valve convex ; beak produced, 

 curved, keeled ; foramen rather large ; deltidium distinct, solid. 

 Lon. 16, lat. 9, alt. 7 lines. 



Terebratula longa, Ziefen, 1830, Petr. p. 52. pi. 39. f. 7. 



D'Orb. Prod. i. p. 344. 

 Terebratula biplicata, Bronn, Index, p. 1241 (not Sow.). 

 Terebratula lagenaUs, Braun (not Schl.). 

 Fossil. Coral Rag. Wurtemberg ; Bavaria ; Switzerland. 



44. Terebratula insignis. B.M. 



Shell oval, smooth ; front margin angularly raised ; dorsal 

 valve much flattened from the umbo to the front margin ; beak 



