DENTALIUM, rAL.EOZOIC. 231 



D. granosum var. kevigatum Eichwald, 1860. Letlisea Rossica, 

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



Orthoceratites limestone, Poulkova, Russia. 



D. HERCULEUM Koniiick, 1863. Quart. Journ. ' Geol. See. 

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



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

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



Carboniferous " Productus Limestone" Salt Range, India. 



D. ibergense Rcemer, 1855. Geol. Kennt. n.-w. Hartzgebirges. 

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



Upper Devonian, Iberg White Chalk, Hartz Mountains. 



D. illinoiense Worthen, 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, shaped 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)=i). ingens de Kon., internal cast. 



D. INORNATUM M'Coj, 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. N. 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. 

 Marys, Mo. 



