NAniLID^. 
121 
creniilated upon the last whorl. He suggests that crenatus may be 
only a variety of C. cariniferus. The fragment figured by M‘Coy is, 
however, too imperfect to be determined without more material. 
Horizon. Calcschistes de Tournai (Assise 1 <?),= Carboniferous 
Limestone. 
Locality . Tournai, Belgium. 
Fairly well represented in the Collection. 
Ccelonantilus subsulcatus, Phillips, sp. 
1836. Nautilus subsulcatus, Phillips, Geol. of Yorkshire, pt. ii. p. 233, 
pi. xvii. H. 18, 25. {Not of J. de C. Sowerby, nor H. Trautscliold, 
nor F. Eoemer.) 
1836. Nautilus sulcatulus, Phillips, ibid. “ Reference to the Plates of 
Organic Remains,” p. 250. 
1844. Nautilus subsulcatus, de Koninck, Descrip, des Anim. Foss, dii 
Terr. Carb. de la Belgique, p. 548, pi. xlvii. H. 9, a, b, pi. xlix. tf. 4, 
a, b (not pi. XXX.). 
1844. Nautilus (Discites) subsulcatus, M'Coy, Synop. Carboniferous 
Foss. Ireland, p. 19. 
1847. Nautilus subsulcatus, d'Orbigny, Pal^ont. Universelle, vol. i 
pi. xcii. ff. 1-6. 
1849. Nautilus subsulcatus, d’Orbigny, Prodr. de Pal«5ont. Stratigr. 
vol. i. p. 110. 
1852. Nautilus subsulcatus, Giebel, Fauna der Vorwelt, Band iii. 
Abth. i. p. 176. 
1854. Nautilus subsulcatus, Morris, Cat. Brit. Foss. p. 309. 
1855. Nautilus {Discites) quadratus, M'Coy, British Pal. Foss. fasc. 
iii. p. 560. 
1860. Discites subsulcatus, Griffith, Journ. Geol. Soc. Dublin, vol. ix. 
p. 56. 
? 1860. Nautilus subsulcatus, Eichwald, Lethaea Rossica, vol. i. Seconde 
Sect, de I’ancienne Periode, p. 1312, pi. xlix. f. 21 (a fragment 
only). 
1873. Nautilus {Discites) subsulcatus, de Koninck, Rech. sur les Anim. 
Foss. vol. ii. p. 110, pi. iv. f. 10. 
1877. Nautilus subsidcatus, de Koninck, Rech. sur les Anim. Foss. 
Pal^oz. de la Nouv.-Galles du Sud, p. .345, pi. xxiv. f. 4. 
1878. Nautilus subsulcatus, de Koninck, Faune du Calcaire Carbonifere 
de la Belgique (Annales du Mus. Roy. d'Hist. Nat. de Belgique, 
tom. ii.), pt. i. p. 132, pi. xxvii. ff. 13, 14. 
1«83. Nautilus subsulcatus, Gaudry, Les Enchainements du Monde 
Animal dans les Temps G^ologiques (Foss, primaires), p. 174, 
fig. 171. 
1883. Trematoceras subsideatum, Hyatt, “ Genera of Fossil Cephalo- 
pods,” Proc. Boston Soc. Nat. Hist. vol. xxii. p. 292. 
