128 
NAUTILOIDEA. 
1844. Nautilus {Temnocheilus) glohatus, M‘Coy, Synop. CarboDiferou£i 
Foss. Ireland, p. 21. 
1849. Nautilus glohatus, d’Orbiofny, Prodr. de Paleont. Stratigr. vol. i. 
p. 111. 
1852. Nautilus ingens, Giebel, Fauna der Vorwelt, Band iii. Abtb. i. 
p. 166. {Not of Martin.) 
1854. Nautilus glohatus, Morris, Cat. of British Fossils, 2nd ed. 
p. 308. 
1860. Temnocheilus glohatus, Griffith, Journ. Geol. Soc. Dublin, vol. ix. 
p. 77. 
? I 860. Nautilus suhglohosus. Meek and Worthen, Proc. Acad. Nat. 
Sci. Philad. p. 4*69. 
P 1866. Nautilus glohatus, Meek and Worthen, Geol. Surv. Illinois, 
vol. ii. p. 305, pi. xxiv. ff. 5 «, 5 h. 
1876. Nautilus glohatus, Armstrong, Young, and Robertson, Cat. of 
Western Scottish Fossils, p. 59. 
1878. Nautilus Atlantoideus, de Koninck, Faune du Calcaire Carboni- 
fere de la Belgique (Ann ales du Mus. Roy. d’Hist. Nat de Bel- 
gique, tom. ii.), p. 97, pi. xi. ffi 1 a, 1 &, 2 a, 2 b. 
1883. Vestinautilus glohatus, Hyatt, Proc. Boston Soc. Nat. Hist, 
vol. xxii. p. 295. 
[Not 1836. Nautilus glohatus, Phillips, Geol. of Yorkshire, pt. ii. 
p. 232, pi. xvii. ff. 20, 28 ?. — 1855. Nautilus glohatus, M‘Coy, 
British Pal. Foss. fasc. iii. p. 558. — 1878. Nautilus glohatus, de 
Koninck, Faune du Calcaire Carbonifere de la Belgique (Aunales 
du Mus. Roy. d’Hist. Nat. de Belgique, tom. ii.), p. 95, pi. x. 
ff. 2-4, pi. xxxi. f. 1. — 1888. Nautilus glohatus, Tzwetaev, Memoires 
du Comite Geologique [Russia], vol. v. no. 3, p. 54, pi. v. 
ff. 25, 26.] 
Sp. Char. “ Subglobose, smooth, umbilicated ; whorls few, inner 
ones concealed, rather flattened on the front, rapidly increasing ; 
umbilicus deep, with an angular margin ; aperture very wide, arched, 
with a deep sinus in the front.” (Soiuerbg.) 
EemarJes. The characters of this shell are very well marked. 
The whorls are two and a half or three in number, and all exposed 
in a deep umbilicus, the sides of which are very steep, and are 
bordered by a sort of keel which is slightly inflected, so as to over- 
hang, as it were, the umbilicus. The shell increases rapidly in 
size, and is very globose in the young, but becomes flattened upon 
the periphery in the adult, the ratio of the transverse to the ventro- 
dorsal diameter being as 30:21. At a little distance from the 
aperture the body-chamber becomes straightened and a little pro- 
duced beyond the coiled part, both in young and adult shells. The 
body-chamber occupies about half the last whorl. The septa are 
rather approximate, their distance in a young shell being about 
I 
