XAniLID^. 
301 
species obscures its characteristic form, and it may be doubtful 
whether we have here the fossil described by Schliiter. 
Horizon. Upper Chalk. 
Locality. Maestricht (Limburg), Belgium. « 
Eepresented in the Collection by a single example (Xo. 81677). 
Nautilus Darupensis ?, Schliiter. 
1876. Nautilus Darupensis, Schliiter, Cepbalopoden der oberen deut- 
schen Kreide, Palseontographica, Baud xxiv. Abth. ii. p. 176 (56), 
Taf. xhx. ff. 4, 5. 
Sp. Char. Shell somewhat compressed on the sides, with a rather 
narrowly rounded periphery. Aperture about as wide as high. 
Umbilicus closed. The septa are very distant from each other, 
there being only 10 to a whorl in a specimen having a maximum 
diameter of about 6 inches. The siphuncle is situated very close 
to the peripheral margin. The surface of the cast is quite smooth. 
Ilemarls. The very distant septa in this species distinguish it 
from all others which it may in other respects resemble. My friend 
Mr. G. C. Crick informs me that in some MS. Xotes by Dr. Mantell, 
contained in the Library of the Geological Society of London, there 
is a sketch of the shell (Xo. 30212) here referred to N. Darupensis. 
Horizon. Upper Chalk. 
Locality. Sussex. 
Nautilus quadrilineatus, Uavre. 
1869. Nautilus quadrilmeatus, Favre, Description des Mollusques Fos- 
.siles de la Craie des Environs de Lemberg en Galicie, p. 10, pi. hi. 
if. 4, «, h. 
Sp. Char. Shell inflated, smooth, with rounded sides and peri- 
phery. There are two flat spiral bands upon the sides ; the inner 
one, 5 millim. wide, is rather prominent, and is placed at a distance 
of -73 millim. from the umbilicus. The outer one, narrower and 
less conspicuous than the other, is situated at the junction of the 
sides and periphery at *92 millim. from the umbilicus. The umbi- 
licus, though presenting a small opening in the cast, must be com- 
pletely closed when the shell is preserved. The aperture has a 
somewhat quadrangular form, rounded in front, higher than wide. 
The septa are moderately approximate and slightly sinuous, the 
sutures passing across the periphery with scarcely any curvature. 
The position of the siphuncle is unknown. A median raised line 
runs along the periphery. The cast only of this shell is known. 
