NAUTILID^. 
293 
Horizon. Lower Chalk. 
Localities. British. Dover, Kent; Sussex ; Yentnor, Isle of Wight ; 
ClifFe Anstey, Caine, Y^iltshire (Chalk Marl) : Lewes, Kewhaven, 
Sussex (Grey Chalk) : Burham, Kent. — Foreign. Eouen (Calvados), 
France (Craie Chloritee). 
Well represented in the Collection, which contains a great num-’ 
her of specimens, including an example from the typical locality of 
the species, viz. Kouen, presented by J. E. Lee, Esq., E.S.A , F.G.S. 
Nautilus Sowerbyanus, d’Orbigny. 
1840. Nautilus Soicerbijanus, d’Orbigny, Paleontologie Fran^aise (Ter- 
rains Cr^tac^s), vol. i. p. 83, pi. xvi. 
18*50. Nautilus Suicerbyanus, d’(!)rhigny, Prodrome de Paleontologie 
Stratigraphique, vol. ii. p. 189. 
18*52. Nautilus Sowerbyanus, Giebel, Fauna der Vorwelt, Band iii. 
Abth. i. p. 1*50. 
18*58. Nautilus Soicerhyanus, Hauer, Beitriige zur Palaontographie 
von Oesterreich, Baud i. Ileft i. p. 14, Taf. i. ff. 1, 2. 
1858. Nautilus Sowerbyanus, Ooster, Catalogue des Cephalopodes Fos- 
siles des Alpes Siiisses, pt. iii. p. 14. 
1859. Nautilus Sowerbyanus, Pictet et Camjaclie, Description des Fos- 
siles du Terrain Cr^tace des Environs de Sainte-Croix (Paleonto- 
logie Suisse), ser. ii. pt. i. pp. 140, 149. 
1870. Nautilus Sowerbyanus, de J^ongiiemar, Etudes Geologiques et 
Agronoiniques sur le Depart, de la Vienne, p. 487. 
SiJ. Char. Shell compressed on the sides, narrowly rounded on 
the periphery ; umbilicus small, with rather steeply sloping sides. 
Aperture higher than wide ; widest in the umbilical region. Body- 
chamber occupying about half a volution. Septa moderately distant 
from each other, about 16 to a whorl in a specimen whose greatest 
diameter is about 4| inches. Sutures slightly curved upon the sides 
of the shell and bent somewhat abruptly on approaching the umbi- 
licus. Siphuncle about central L Casts quite smooth. Test un- 
known. 
liemarlcs. This species most nearly resembles Nautilus Fleuriau- 
sianus, d’Orbigny (p. 268), the differences between the two species 
having already been pointed out under the description of the latter. 
Horizon. Lower Chalk. 
Locality. Bourre (Loire-et-Cher), France. 
Well represented in the Collection. 
^ The sinbuncle is well shown in the specimen nurabered 37271. Its posi- 
tion was unknown to d’Orbigny when he wrote his description. 
