220 DENTALIUM, MESOZOIC. 



D. ARCTUM Picliler, 1857. Jahrb. Min. & Geol., p. 695 ; Giimbel, 

 Geognostische Besclireib. des Bayeriscben Alpengebirges, p. 274 

 (1861). 



Trias, Tyrol. 



D. BicosTALE Ryckliolt, 1852. Mem. Couronn. Acad. Roy. Sci. 

 Belg., Vol. xxiv, p. 71, pi. ii, figs. 43, 44. 



Cretaceous, Tournay, Belgium. 



This is considered by Gardner a synonym of D. decussatum SoYfh. 



T>. BiNKHORSTi Pilsbry & Sharp, 1898. New name for Z). iiysti 



Binkhorst, 1861, not of d'Orb. 1852. See Binkhorst, Monogr. 



Gast^rop. et Cephalop. Craie Super, du Llmbourg, p. 61, pi. 6, f. 2 



a, b, c. 



Cretaceous of Belgium. 

 D. CALiFORNicuM Stanton, 1895. Bull. U. S. Geol. Surv. No. 

 123, p. 62, 63, pi. xii, fig. 3. 



Cretaceous (Knoxville beds) California. 

 D. CHiLENSE D'Orbigny, 1847. Voy. Pole Sud, (Astrolabe and 

 Zelee) Geology, pi. iv, fig. 37, 38. 



Cretaceous, Chili. 



D. ciDARLsGeinitz, 1849. Quadersandsteingebirge, p. 144. New 

 name for D. striatum Geinitz, 1839, not of Sowerby. 



D. striatum Geinitz, 1839 (not of Sowerby). Charac. Schicht. 

 u. Petrifac. Saechs. Kreidegebirg., p. 74, pi. 18, fig. 27. 



D. striatum "Sowerby," Mantell, Geol. of Sussex, etc., p. 87, 

 pi. 19, f 28; Reuss, Verstein. Bohm. Kreideform., p. 41, pi. 11, f. 

 18. (Not of Sowerby, 1812, nor of Born, 1780). 



D. reussianum Ryckholt, 1852. Mem. Couronn. Acad. Roy. 

 Sci. Belg., Vol. xxiv, p. 70. 



Cretaceous, Belgium, Saxony and England. 



D. ccELATULUM Baily (in Salter), 1857. Quart. Jour. Geol. Soc. 

 Lond., Vol. xiii, p. 87, pi. ii, fig. 8. 



Cretaceous, Upper Greensand, Aberdeenshire. 



D. COMPRESSUM D'Orbigny, 1850. Prodr. Paleout. Strat., Vol. 

 i, p. 233, No. 135. 



Jurassic, France. 



D. CONFUSUM Sharp & Pilsbry, 1898. New name for Z). a/<er- 

 nans, Ryckholt, Mem. Couronnes et Mem. des Savants Etrangers, 

 pub. par I'Acad. Roy. Sci. de Belgique, 4to, xxiv, 1850, 1851, p. 

 71, pi. 2, r. 45, 46 (1852). Not D. alternans Chenu, 1842. 



Turonien, at Vise, Belgium. 



