220 
NAUTILOIDEA. 
1857. Nautilus inornatus, Etheridge, in Mem. Geol. Siirv. Great Britain : 
Hull, On the Country around Cheltenham, p. 27. 
1858. Nautilus inornatus, Ooster, Cat. des Cephalopodes Fossiles des 
Alpes Suisses, pt. iii. p. 8. 
1863. Nautilus inornatus. Hay, Quart. Journ. Geol. Soc. vol. xix. 
p. 291. 
1864. Nautilus inornatus, Eudes-Heslongchamps, Etudes sur les Etages 
Jurassiques Inferieurs de la Normandie, p. 83. 
1871. Nautilus inornatus, Phillips, Geology of Oxford and the Valley 
of the Thames, pp. 131, 164. 
? 1877. Nautilus inornatus, J. Buckman, Quart. Journ. Geol. Soe. 
vol. xxxiii'. p. 2. 
1879. Nautilus cf. inornatus, d’Orb., Branco, Her Untere Dogger 
Deutsch-Lothringens (Abh. zur geol. Specialkarte von Elsiiss- 
Lothringen), Band ii. Heft i. p. 57. 
1884. Nautilus inornatus, Mallada, Bol. Com. del Maj a Geol. de 
Espana, Sinopsis de Fdsiles de Es})afia, vol. xi. p. 228. (Figured 
ibid. vol. V. 1878, pi. iii. fl‘. 5, 6.) 
1890. Nautilus inornatus, Eoord and G. C. Crick, Ann. Mag. Nat. 
Hist. ser. 6, vol. v. p. 282, f. 12. 
Fig. 47. 
haiitilus inornatus. — a, lateral view of a cast, showing the septa and veiy 
small umbilicus ; h, front view, showing the siphuncle, “ normal line,” 
and septa. Drawn from a 'specimen in the British Museum (No. C. 2843). 
Bather less than one half natural size. 
Char. “ Shell inflated, smooth, slightly umbilicated, flattened 
on the sides and periphery, making the section subquadrate, the 
greatest thickness being just above the umbilicus. Aperture wider 
than high. Sutures rather flexuous on the sides and curved back- 
wards in crossing the periphery. There is a small dorsal (internal) 
