DENTALIUM, PALEOZOIC. 231 



D. granosum var. Icevigatum EICHWALD, 1860. Lethsea Rossica, 

 Vol. i, pi. 40, fig. 11, no text. 



Orthoeeratites limestone, Poulkova, Russia. 



D. HERCULEUM Koninck, 1863. Quart. Journ. Geol. Soc. 

 London, Vol. xix, p 8, pi. iv, figs. 10-12. 



Entails herculea WAAGEN, Mem. Geol. Surv. India, Productus 

 Limestone fossil?, p. 181-182, pi. xvi, figs. 1, 2, 3 (1887). 



Carboniferous " Productus Limestone" Salt Range, India. 



D. IBERGENSE Roemer, 1855. Geol. Kennt. n.-w. Hartzgebirges. 

 Palseontographica, Vol. v, p. 36, pi. vii, fig. 7. 



Upper Devonian, Iberg White Chalk, Hartz Mountains. 



D. ILLINOIENSE Wortheu, 1883. Geol. Surv. of Illinois, Vol. 7, 

 p. 325. 



Subcarboniferous ; Lowest beds of the Chester limestone (Kaskaskia 

 Group), Chester, Illinois. 



D. INGENS Koninck, 1841. Descr. Anim. foss. terrain Carbon- 

 ifere Belgique, p. 317, pi. 22, fig. 2. Ann. Mus. d'Hist. Nat.Belg., 

 viii, pt. 4, p. 217, pi. 49, f. 10-12, 18, 19 (1883). 



Carboniferous, Vise, Belgium. 



A large species, sbaped like D. ceras, but smooth with circular 

 instead of longitudinal wrinkles. It attains a length of 200 mill. 



D. incequale RYCKHOLT, 1852, not of Bronn, 1831. Mem. Cou- 

 ronn. Acad. Roy. Sci. Belg., Vol. xxiv, p. 67-68, pi. ii, figs. 41-42. 

 (Carboniferous at Vise)=ZX ingens de Kon., internal cast. 



D. INORNATUM M'Coy, 1844. Synops. Garb. Foss. Ireland, p. 47, 

 pi. 5, f. 30. R. ETHERIDGE, Geol. Mag. (dec. ii), iv, p. 248, pi. 

 13. f. 1. 



Carboniferous, Ireland; and " Ardross limestone" near Elie, Fife, 

 Scotland. 



D. MARTINI Whitfield, 1882. Ann. X. Y. Acad. Sci., Vol. ii, p, 

 203 ; Rep. Geol. Surv. Ohio, vii, p. 423, pi. 3, f. 10. 



Devonian, Upper Helderberg limetone, near Dublin, Ohio. 



D. MEEKIANUM Geinitz, 1866. Garb, und Dyas in Nebraska, 13, 

 pi. 1, f. 20 ; Geol. Surv. Illinois, Vol. v, p. 590, pi. 29, f. 8. 



Carboniferous, Danville, Illinois. 



D. MISSOURIENSE Swallow, 1863. Trans. Acad. Sci. St. Louis, 

 Vol. ii, p. 99. 



Subcarboniferous, Kaskaskia Group, Chester, Illinois, and St. 

 Mary's, Mo. 



