82 SRACttlOPODA. 



92. Waldheimia? prominula. 



Shell oblong, rather truncated in fi'ont, ornamented with 

 twenty-four sharp radiating ribs ; valves convex, slightly flattened 

 along the centre ; naargins dentate ; beak prominent, slightly 

 curved, truncated by a round foramen ; deltidium elongated, bor- 

 dered by a smooth space. Lon. 10, lat. 8, alt. 5 lines. 



Terebratula prominula, Roemer, Rhein. Ueberg. p. 66. pi. 5. f. 3, 



D'Orb. Prod. i. p. 100. 

 Fossil. Devonian. Prussia. 



93. Waldheimia? ulothrix. 



Shell somewhat transverse, rounded, with 9-11 shai-p radiating 

 plaits; surface ornamented with wavy, concentric Unes, espe- 

 cially near the margin ; beak small, reciu-ved ; aperture rounded ; 

 area small, ti'iangular, distinct. Lon. 6, lat. 7i, alt. 4 lines. 



Terebratula crispata, Koninck, Descr. p. 292 (not Sow.). 

 Terebratula ulothrix, Kon. 1844, id. pi. 19. f. 5, note. 

 Terebratula subcrispata, D'Orb. 184/, Prod. i. p. 161. 



Fossil. Carboniferous. Belgium. 



94. Waldheimia? trilatera. 



Shell small, triangular, elongated, laterally compressed, orna- 

 mented with 18-22 sharp radiating plaits, each valve with a 

 medio-longituthnal depression ; beak short, acute, straight ; fora- 

 men minute; area inconspicuous. Lon. 5^, lat. 4^, alt. 2i lines. 



Terebratula trilatera, Koninck, 1844, Descr. p. 292. pi. 19. f. /• 



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

 Fossil. Carboniferous. Belgium. 



e. Beak elongated ; valves ornamented with rounded ribs. Lyra. 



Lyra (Meadi), Cumberland, 1816, in Sow. Min. Con. 

 Trigonosemus, Kanig, Icon. Sect, (part.) 1825. 

 ?Rhynchora (costata), Dalman, 1828, Vetens. Acad. p. 136. 



Hisinger, Letheea Suecica. 

 TerebratuliE rostrata;, Morris, 1846, Journ. Geol. Soc. p. 385. 

 RliTOchorida;, King, Permian Fossils, 81, 141. 

 Terebrirostra (lyra), D'Orbigny, 1848, Ann. Sc. Nat. Terr. Cret. 

 iv. t.519. 



Dav. 1852, Mon. Cret. p. 31. 



