NAUTILlDJi. 
219 
along the curve of the periphery, the last-formed septum being 
inches wide, and the width of the aperture 9| inches. Fig. 46 has 
Fig. 46. 
been reduced with the camera from a tracing of the actual impres- 
sion : a indicates the anterior and p the posterior boundary ; s in- 
dicates a portion of the last-formed septum. The irregular line on 
either side of the figure represents merely the broken edge of the 
umbilicus. Although the specimen is so badly preserved, not only 
can the anterior boundary of the muscular impressions and annulus 
be made out, but a portion also of the posterior boundary. On one 
side of the body-chamber several lines close to and concentric with 
the anterior boundary of the impression indicate former points of 
attachment of the anterior edge of the shell-muscle, and may be 
compared with similar lines to be observed in the shell of the recent 
Nautilus h 
“ On comparing examples of this species from the Inferior Oolite 
of Courcy, Normandy, with d’Orbigny’s figure of Nautilus lineitus'^, 
wo find that they agree remarkably well, and we have therefore 
placed the N. Uneatus of d’Orbigny in the synonymy of the present 
species.’’ {Foord and G. C. Crick.) 
Horizon. Interior Oolite. 
Localities. British. Duston, Litchborough, Northamptonshire ; 
Bath, Dundry, Somersetshire ; Minchinhampton, Gloucestershire. — 
Foi'eign. Courcy, Normandy ; Aalen, Wurtemberg. 
Well represented in the Collection. 
Nautilus inornatus, d’Orbigny. 
1842. Nautilus inornatus, d’Orbigny, Paleontologie Fran^aise, Terr. 
Jurass. voL i. p. 152, pi. xxviii. 
1845. Nautilus inornatus, Murchison, Outline of the Geology of the 
Neighbourhood of Cheltenham, new ed. p. 91. 
1849. Nautilus inornatus, d’Orbigny, Prodr. de Paleont. Stratigr. vol. i. 
p. 245. 
^ See Fig. 32, a, ante, p. 179. 
^ Paleont. Frau 9 ., Terr. Jurass. vol. i. p. 155, pi. xxxi. figs. 1, 2. 
