2G8 
NAUTILOIDEA. 
Nautilus Fleuriausianus, d’Orbignj'. 
1840. Xaidilus Fleui'iausianus, d’Orbigiiy, Paleoiitologie Fran^aise 
(Terrains Cretaces), a'oI. i. p. 82, pi. xv. 
? 1853. Nantilus Fleuriansianiis, Sharpe, Description of tlie Fossil 
Remains of Mollusca found in the Chalk of England, pt. i. Cepha- 
lopoda, Mon. Pal. Soc. p. 10, pi. vi. ff. 3 «, 3 h. 
1854, Nautilus Fleuriausia)ius, Morris, Catalogue of British Fossils, 
2nd ed. p. 307. 
1866. Nautilus Fleuriausianus, Stoliczka, Mem. Geol. Surv. of India — 
Palaeont. Indica — i. Cretaceous Cephalopoda of Southern India, 
p. 206, pi. xciv. ff. 1, 1 a. 
1870. Nautilus Fleuriausiauus, Schliiter, Palaeontographica, Band xxiv. 
Lief. ii. p. 169 (40), pi. xlv. ff. 3, 4. 
P 1880. Nautilus elegaiis, Mourlon, Geologie de la Belgique, vol. i. 
p. 165. 
/Sj). Char. Shell compressed, with somewhat flattened sides and 
rounded periphery ; umbilicus small ; aperture higher than wide, 
deeply indented by the preceding whorl. Septa slightly flexuous on 
the sides, and very slightly emarginate on the periphery. Siphuncle 
below the centre. Casts smooth. 
Remarhs. The nearest species to this is the Natitilus Sotverhi/anus 
of d’Orbigny, but the latter is a thicker shell with a more rounded 
periphery, larger umbilicus, and more sinuous septa. 
It must be remarked that Sharpe’s figure of N. Fleuriausianus 
differs somewhat from d’Orbigny’s, as it represents a shell with a 
much broader periphery, and the sutures are also more ffexiious, 
approaching in these characters the N. Sowerhyanus of d’Orbigny, 
which is, however, distinguished by its much smaller umbilicus. 
Sharpe has united N. Fleuriausianus and N. Sowerhyanus in spite 
of the differences just enumerated. 
A fragment (No. 83228), alleged to be from Tournai, Belgium, but 
more probably from Mo ns, may be referred to this species. The 
body-chamber only is preserved ; it is very compressed, with a nar- 
rowly rounded periphery at its base ; the suture-line of the last 
septum can be made out, and it agrees essentially with the sutures 
of the present species. 
Horizon. Dpper Greensand. 
Localities. British. Devizes, AYiltshire. — Foreign. ? Mous, Bel- 
gium. 
Represented in the Collection by two examples. 
