2b2 
NAUriLOIDEA. 
Nautilus Deslongchampsianus, d’Orbigny. 
1822. Nautilus elegans, JMantell, Fossils of the South Downs, or Illus- 
trations of the Geology of Sussex, p. 112, pi. xxi. f. 8. 
1840. Nautilus Deslongchampsianus^ d’Orbigny, Paleontologie Fran^aise 
(Terrains Cr^taces), vol. i. p. 00, pi. xx. 
1847. Nautilus Deslongcliampsianus^ Raulin, Mem. Soc. G^ol.de France, 
ser. ii. vol. ii. p. 220. 
1847. Nautilus Deslongchampsianus, Sisiiionda, Mem. Acad. Turin, 
ser. ii. vol. ix. 
1850. Nautilus Deslongchampsianus, d’Orbigny, Prodrome de Paleon- 
tologie StratigTaphique, vol. ii. p. 145. 
1852. Nautilus Deslongchampsianus, Giebel, Fauna der Vorwelt, 
Band iii. Abth. i. p. 144. 
1853. Nautilus Deslongchampsianus, Studer, Geologie der Schweiz, 
vol. ii. p. 291. 
1853. Nautilus Deslongchampsianus, Sharpe, Description of the Fossil 
Remains of Mollusca found in the Chalk of England, pt. i. Cepha- 
lopoda (Mon. Pal. Soc.), p. 12, pi. iii. ff. 1 a, 1 h, 2. 
1853. Nautilus Neocomiensis, Shaiq)e, ibid. p. 15, pi. v. ff . 3 «, 3 6, 3 c. 
? 1853. Nautilus radiatus, Sharpe, ibid. p. 14, pi. v. ff . 1 a, 1 h, 2. {Not 
of J. Sowerby.) 
1854. Nautilus Deslongchampsianus, Moriis, Catalogue of British 
Fossils, 2nd ed. p. 300. 
1858. Nautilus Deslongchampsianus, Ooster, Catalogue des Cephalo- 
podes Fossiles des Alpes Suisses, pt. iii. p. 13. 
1859. Nautilus Deslongchampsianus, Pictet et Campiche, Description 
des Fossiles du Terrain Cretace des Environs de Sainte-Croix 
(Paldontologie Suisse), s<§r. ii. pt. i. pp. 122, 137. 
1862. Nautilus Deslongchampsianus, Bristow and Etheridge, Mem. 
Geol. Surv. of Great Britain — Geology of the Isle of Wight 
(Sheet X.), p. 137. 
1865. Nautilus Deslongchampsianus, Tate, Quart. .Journ. Geol. Soc. 
vol. xxi. p. 28. 
1871. Nautilus Deslongchampsianus, Phillips, Geology of Oxford and 
the Valley of the Thames, p. 441. 
1881. Nautilus Deslongchampsianus, Etheridge, in Penning and Jukes- 
Browne’s Geology of the Neighbourhood of Cambridge (Mem. 
Geol. Surv. of England and Wales), p. 137. 
Sp. Char, “ Shell subglobose, umbilicated, elegantly ornamented 
with sharp, elevated, transverse flexuous ribs, which are usually 
crossed by thin longitudinal lines ; the latter obliterated in ill- 
preserved casts ; the ribs rise within the umbilicus, and are bent at 
a sharp angle over its carinated margin ; they then sweep forward 
in a bold curve, and form a deep sinus on the back [periphery], 
where they occasionally divide into two ; the ribs are steepen their 
