DENTALIUM, PALAEOZOIC. 233 



D. soRBii King, 1850. Monogr. Permian Foss., p. 218. 

 D. sorbiji of some authors. 



D. speyeri Geinitz, 1852. Jabresber. der Wetterauer Gesellsch., 

 1850-'51. p. 198. 



Permian : Ireland, Germany. 



D. suBCANALicuLATUM Saiidberger, 1842. Jahrb. Min. u. Geol., 

 1842, p. 399 (no description); Verstein. Rheiuiscben Sebicbtensys- 

 tems Nassau, 1850-1856, p. 240, pi. 26, f. 19, 19a. 



" Stringoceplialushalk" Villmar, Prussia. 



D. suBL^VE Hal], 1877. New name for D. obsoletum Hall, 

 1858, in Miller, 1st edition Amer, Palaeozoic Foss., p. 244. 



D. obsoletum Hall, 1858. Rep. Geol. Surv. of Iowa, i, pt. 2, p. 

 724, pi. 29, f. 16, 17. (Not of Scblotbeim, 1832). 



Coal measures of loiva. 

 D. TAENiOLATUM Sandberger, 1856, Verstein. Rbein. Scbiebt. 

 Nassau, 1850-56, p. 241, pi. 26, figs. 21-21a. 



Carboniferous, " Stringocephaluskalk," Nassau, Germany. 



D. TENuissiMUM Koninck, 1876. Palseont. Nouv.-Galles du 

 Sud, pt. 2, p. 117, pi. 4, fig. 3. 



Devonian, Yass, N. S. Wales, Australia. 



D. VENUSTUM Meek & "Wortbeu, 1861. Proc. Acad. Nat. Sci. 

 Pbila., p. 145. 



Su bear boniferous, St. Louis limestone, Waterloo, Monroe Co., Illi- 

 nois. 



D. VERRucosuM Eicbwald, 1856. Bull. Soc. Imp. Nat. Moscou, 

 Vol. xxix, pt. 2, p. 584 ; Letbsea Rossica, i, p. 1063, Atlas, pi. 40, 

 fig. 6. 



Carboniferous: Artiuskian stage of the Permian, Artiush, Oural 

 Mts. 



D. WALCIODORENSE (Koninck), 1883. 



Entalis walciodorensis Koninck, Ann. Mus. Roy. d'Hist. Bel- 

 gique, viii, pt. 4, p. 215, pi. 49, f. 16, 17 (1883). 



Carboniferous, Belgium. 



Family SIPHONODENTALIIDJE. 



Tbe earliest forms referable to tbis family appear in tbe middle 

 Cretaceous, tbe number of species rapidly increasing to tbe present 

 time, as sbown in tbe following table : 



