290 
XATJTILOIDEA. 
Gault or of the Cambridge Greensand, Sowerby’s little shell belongs 
to ; and on the whole I think it would be best, under the circum- 
stances, to abandon the name inceqiialis altogether.] 
Nautilus Hunstantonensis, Foord and G. C. Crick. 
1890. Nautilus Hunstantonensis, Foord and G. C. Crick, Ann. & Mag. 
Nat. Hist. ser. 0, vol. v. p. 401, ft'. 4, o. 
Nautilus Hunstantonensis. — a, lateral view, showing the open umbilicus ; h, peri- 
pheral view, showing the lines of growth. Drawn from a specimen in the 
British Museum (No. C. 932), presented bv J. E. Lee, Esq., E.G.S. About 
one half natural size. 
/Sp. Char. “ Shell moderately inflated, slightly compressed on the 
sides, rounded on the periphery, widest part of the whorls in the 
umbilical region. Umbilicus small, deep, with steeply sloping sides 
and rounded edges. Septa rather wide apart, fourteen to a whorl 
in a specimen whose diameter is 3 inches (fig. 64). Siphuncle a 
little above the centre in the young shell, but getting much nearer 
the peripheral margin in the process of growth, as may be seen in the 
accompanying section (fig. 65), which is drawn (about three fifths 
nat. size) from a specimen in the British Museum (No. 82449). 
Surface of the test ornamented with obscure and irregular plications, 
commencing in the umbilicus, where the}" are most distinct, but be- 
coming less so as they approach the periphery. Fine lines of growth 
cover the whole of the test. 
