UKACIIIOl'ODA. 79 



Tcrcbriitula ol)(ilinn, Bnrrande, 1S47, in Haidinger's Abhandl 



p. KM. t. L'O. f. :». 

 Atry])a oboliim, D'Orh. Prod. i. j). 40. 

 Fossil. U. SHitriuii. Ilolicmia. 



8.3. Waldiikimia? ha.mifkra. 



Shell oil)i<iilar. ooiivi-x, smooth, with very obscure radiating 

 8tri»c. Loii. IS, hit. 1!) Hiu-s. 



Terebratula haiiiifera, Barrande, 1847, in Haidinger's Abhandl. 

 p. 417. t. JO. f. !^ 



irOrb. Prod. i. p. 43. 



Fossil. U. Silurian. Bohemia. 



d. Beak round ; valves sharply plaited. Eudesia. 



Terebratula; costatae, Morris, 184(5, Journ. Geol. Soc. p. 385. 

 Eudesia (orbicularis), King, 1849, Permian Fossils, 81. 144. 



84. Waldheimia Grayii. B.M. 



Shell suborbicular, ornamented with numerous radiating ribs ; 

 ribs unequal, bifurcating and intercalating ; colour reddish yellow, 

 becoming deep red at the lines of growth ; dorsal valve rather 

 flat; ventral valve convex; beak obtuse, with distinct lateral 

 ridges ; foramen very large, incomplete ; deltidia disunited ; loop 

 elongated, reflected. Lon. 14, lat. 15, alt. i) lines. 



Terebratula Gravii, Davidson, Mav 1852, Ann. Nat. Hist. p. 365 ; 



Zool. Proc. 1852, p. . pi. .f. 1-3. 

 Hab. Korea. 



85. Waldheimia Beaumonti. B,M. 



Shell oval, hiflated, ornamented with 12-14 elevated, radiating 

 plaits, sometimes bifurcating, and crossed by numerous hues of 

 growth ; valves equally convex ; beak prominent, nearly straight, 

 pointed ; foramen small ; area concave ; deltidium large, trian- 

 gular. Lon. 61, lat. 5, alt. 4 Imes. 



Terebratula Beaumonti, D'Arch. 184/, M6n. Soc. G^ol. Fr. ii. 

 p. 331.pl. 21. f. 12-14. 

 D' Orb. Prod. \i. p. 172. 



Fossil. U. Greensand. Belgium. 



'o' 



86. Waldheimia Marcousana. 



Shell orbicular, ventricose, with 18-20 sharp radiating plaits: 

 valves equally convex, margins deutated ; beak short, cursed. 



