NAUTILID^. 
291 
ri.o'. 65. 
Remarks. “ There are two species in the Gault with which the 
present one may he compared, viz. 
Nautilus Boiichar dianus ^ d'Orbign^’, and 
N. MontmoUini^ Pictet and Campiche. 
Our species agrees with the former of 
these in the position of its siphuncle, 
hut differs in its more numerous septa 
and larger umbilicus, while it is dis- 
tinguished from the latter chiefly by 
the position of its siphuncle, somewhat 
larger umbilicus, and more inflated 
whorls. 
“The gradual shifting of the position 
of the siphuncle in the present species 
from a central position in the young 
to a nearly external position in the 
adult is a feature met with in other species ; Stoliczka has observed 
it in Nautilus Huxleyanus, Blanford, and in N. sphcericus, P^orbes, 
and other species h 
“Many authors have recorded the occurrence of various species of 
Nautilus in the lied Chalk or Hunstanton Limestone ^ ; but the pre- 
sent form does not appear yet to have been characterized.” {Foot'd 
and G. C. Criclc.) 
Horizon. Bed Chalk. 
Locality. Hunstanton, Norfolk. 
AVell represented in the Collection. 
^ Mem. Geol. Surv. India — Palajont. Indica — ser. iii. 1866, p. 205. ' 
^ The following are some of the principal references : — 
(1) Samuel Woodward, ‘An Outline of the Geology of Norfolk,’ 1833, 
p. 5I. — Nautilus elegans. 
(2) Eev. Thomas Wiltshire, “On the Eed Chalk of England,” Geol. 
Assoc. 1859, p. 17, pi. i. fig. 3. — Nautilus sirwpUx. 
(3) H. G. Seeley, “Notice of Opinions on the Stratigraphical Position 
of the Red Limestone of Hunstanton,” Ann. & Mag. Nat. Hist, 
ser. 3, vol. vii. 1861, p. 244. — Nautilus simjplex. 
(4) Rev. T. Wiltshire, “On the Red Chalk of Hunstanton,” Quart. 
Journ. Geol. Soc. vol. xxv. 1869, p. 184. — Nautilus alhensis, N. 
Bouchar dianus. 
(5) W. Hill, “ On the Lower Beds of the Upper Cretaceous Series in 
Lincolnshire and Yorkshire,” Quart. Journ. Geol. Soc. vol. xliv. 
1888, p. 347. — Nautilus, sp. 
u2 
