NAUTILID.E. 
227 
of Natural History, Paris, and there is in the British Museum a 
good representative of it from Moutiers (Calvados). We have also 
seen a young specimen in the Woodwardian Museum, Cambridge, 
which appears to belong to this species ; it is from Dundry, the only 
British locality mentioned by d’Orbigny. N. clausus is evidently 
rare in England, for it is not recorded in any of the papers on the 
geology of Somerset, by Etheridge, Tawney, and Stoddart, and 
Mr. E. Wilson has informed us that there are no examples of it in 
the Bristol Museum. Under these circumstances the determination 
of this species by Wright from Leckhampton Hill (Gloucestershire), 
and by Sharp ^ from the Northampton Sands, must, in the absence 
of descriptions and figures, be accounted of doubtful accuracy. The 
finest specimen of this species that we have seen is from Sherborne, 
Dorsetshire ; it measures 9 inches in diameter and 6| inches in 
width.” {Foorcl and G. C. Crich.) 
The specimen here described now forms part of the National Col- 
lection (No. C. B189). 
Horizon. Inferior Oolite. 
Localities. British. Dundry, Somersetshire ; Halfway House, 
Dorsetshire. — Foreign. Moutiers, Caen (Calvados), France. 
Well represented in the Collection. 
Nautilus lineolatus, Foord and G. C. Crick. 
1890. Nautilus lineolatm, Foord and G. C. Crick, Ann. & Mag. Nat. 
Hist. ser. 6, vol. v. p. 393. (No figure.) 
Sp. Char. “ Shell thick, somewhat inflated on the sides, with a 
broad and flattened periphery ; greatest breadth of the whorls at 
about the middle of the sides ; aperture wider than high, presenting 
a distinctly subquadrate section. Umbilicus very small and deep, 
with rounded border. Septa moderately distant ; sutures rather 
concave on the sides of the shell and forming a very slight sinus on 
the periphery. Siphuncle not seen. Test thick, ornamented with 
subregular lines of growth. 
“ A large example (No. C. 3188) from Yetney Cross, Dorsetshire, 
measures 6 inches in diameter and 4 inches in its greatest breadth. 
RemarJes. “ This species is closely allied to Nautilus clausus^ 
d’Orbigny, but it is distinguished by its less rapid rate of increase, 
by its open umbilicus, and, on tlie whole, by its more compressed 
form. The body-chamber of a young example (No. 36952) exhibits 
traces of the anterior border of the impression of the shell-muscle. 
^ For references to these authors’ papers see the table of synonymy above. 
Q 2 
