HU.\( lIlnl'ODA. 



83 



95. Waldiieimia Davidsoniana, 



Shell siil)()il)icular, «itli a producid. tapiTiiij; hciik ; valvi'stn- 

 lobt'd, oriianu'utotl with sinij)U', radiatiiifj ribs, liccussati-d by a 

 few marki'd liiu's of fjrowth ; (lorsal valve transverse, with a raised 

 f't'iitral lobe; ventral valve witli a loniritndinal furrow; hin)re- 

 liiie nearly as wide as the shell; area triangular; foramen oval, 

 small; (leltidiutn elongated, trianf^ular. Lon. 11, lat. !', alt. o 

 lines. 



Terebrirostra Uavidsoniana, Ryckholt, 1852, Notice sur les genres 



Nautilus, «5-c., p. 10. f. 4-7. 

 Fossil. U. Chalk. Ciply, Belgium. 



96. Waldheimia pectinata. i B.M. 



Shell oblong, ventricose, truncated posteriorly, ornamented 

 with rugose, bifureating ribs; margins toothed, not sinuous; 

 dorsal ralrc eonvex, with a wide and nearly straight hinge-line, 

 furnished inside with a very* wide cardinal ])roeess, and a short, 

 prominent median septum ; crura slender, contiguous ; loop 

 doul)ly attached? ; ventral valce deep, truncated by a very large 

 foramen* ; area and deltidium nearly obsolete ; teeth at the angles 

 of the hinge. Lon. Ki, lat. 19, alt. 9 lines {Morris). 



Anomia pectinata, Linn. 1/67, Syst. Nat. iii. p. 1150, 

 Aiiomites costatus, Wahlenberg, 1821, Acta Upsal. viii. p. 62. t. 4. 



f. 12-1-4. 

 Terel)ratula costata, Nilsson, Petref. Suec. p. 37. t. 3. f. 13. 

 Rhynchora costata, Dalmnn, 1828, Vet. Acad. p. 136. 



Hisiiujer, Leth. Suec. t. 20. 

 Terebratula lyra, (not Sow.), Dalman; Hisinyer; Bronn ; 



Morris. 

 Terebratula pectinata, L. Appendix to Morris's Catalogue, p. 216. 

 Fossil. U. Chalk. Sweden. 



97. WaLDHEIMIA LYRA, B.M. 



Shell l)Te-shaped, straight or slightly curved, striato-costate ; 

 beak about half as long as the shell, slender, tapering, truncated 

 by a small, transversely oval foramen ; deltidium narrow, as long 

 as the beak, bordered on each side by a narrow flat area ; dorsal 

 valve oval, obtuse in front ; ribs rounded, imdulating, simple or 

 bifurcating, or intercalary. Lon. 2/, lat. 10, alt. 7 Hues. 



* The umbones of both valves are worn, as if by contact with the 

 rock, iu all the examples in Loudon cabinets {Woodward). 



