334 
NAUTILOTDEA. 
proximity of these species in the geological series (N. (//.) Danicus 
from the uppermost beds of the Chalk, and N. {H.) Cassinianus from 
from the Lower Eocene) renders their near relationship highly 
probable. 
Nautilus (Hercoglossa) Cassinianus. — a, lateral view of a fragment, showing the 
curvature of the sutures ; b, front view, showing the position of the 
siphuncle. Drawn from a specimen in the British Museum (No. 71003). 
Natural size. 
The name of this species is taken from a list of the Edwards 
Collection of Fossils now in the British Museum, but the species 
was never described. Edwards erroneously placed it in the genus 
Aturia. 
Horizon. London Clay (Lower Eocene). 
Localities. Finchley, Middlesex (Edwards’s type) ; Isle of 
Sheppey. 
Bepresented in the Collection by two specimens. 
Nautilus (Hercoglossa) .ffigyptiacus, Foord. 
Sp. Char. Shell (cast, No. 70378) inflated, very convex on the sides, 
but having a very narrowly rounded, almost subangular periphery. 
The umbilicus appears to be closed. The septa are rather wide apart, 
those seen being inches distant from each other on the periphery, 
where the height of the whorl is from 2| to 3 inches. The sutures 
form two very distinct lobes of equal size, one of which is directed 
forwards on the middle of the sides, and the other bends backwards 
between the first lobe and the umbilicus ; the sutures are nearly 
straight in crossing the periphery. The test is not preserved. 
RemarTcs. In its inflated sides and subangular periphery this 
species bears some resemblance to Nautilus Rolland% Leymerie 
(Mem. Soc. Geol. de France, se'r. 2, 1844, vol. i. pt. i. p. 365, 
pi. xvii. f. 1, two figs.) ; but the sutures of the latter, though 
very flexuous, are not Jobed. Leymerie’s specimen, which is a cast. 
