214 
X.1UTIL0IDEA. 
is also recorded from Somersetshire, but from what ]dace in that 
county is not known. Two specimens, numbered respectively 43854 
Fig. 42. Fig. 43. 
Fig. 42. Nautihis pseudolineatiis. — Lateral view of a specimen, showing the 
closed umbilicus and several of the septa ; the anterior border of tiie 
impression of the shell-muscle is seen on the body-chamber. Drawn 
from a specimen in the British Museum (No. 69767). One third natural 
size. 
Fig. 43. Nmitilus polygonalis. — Lateral view of a specimen, showing the closed 
umbilicus and several of the much-curved sutures. The anterior border 
of the impression of the shell-muscle is seen in a similar position to that 
which it occupies in fig. 42. Drawn from a specimen in the British 
Museum (No. C. 2847). One third natural size. 
(“ Sowerby Coll.”) and C. 2942, have no locality recorded against 
them in the register. 
Well represented in the Collection. 
Nautilus polygonalis, J. de C. Sowerby. 
[See Fig. 43, su])ra.'] 
1826. Nautilus polygonalis^ J. de C. Sowerby, Min. Conch, vol. vi. p. 56, 
pi. dxxx. 
1852. Nautilus polygonalis^ Giebel, Fauna der Vorwelt, Band iii. Abth. i. 
p. 147. 
1854. Nautilus polygonalis, Morris, Catalogue of Biitish Fossils, 
2nd ed. p. 307. 
