106 Mr. J. Morris on a new species 0 / Nautilus. 
X — .Description of a new species of Nautilus from the Lower 
Greensand of the Isle of Wight. By J. Morris, F.G.S.* 
Nautilus Saxbii : Morris, 1847. 
Testa ovali, compressa, complanata, laevigata, subumbillcata ; dorso 
piano sen subcanaliculato ; anfractibus compressis ; apertura sub- 
triangulari, vel subsagittata, lateraliter compressa, antice truncata ; 
septis numerosis valde sinuosis in umbilico flexuosis vel im- 
pressis ; siphunculo subcentrali ? 
Shell discoidal, smooth, slightly umbilicated, with compressed 
and somewhat angular volutions, contracted towards the margin, 
with their greatest diameter near to the umbilicus ; aperture 
somewhat triangular, laterally compressed, anteriorly truncate, 
posteriorly impressed or notched by the preceding volution ; back 
flat, or very slightly channeled in the middle. Septa numerous, 
nearly equal, the margins very sinuous and rather incurved as 
they pass over the back ; one sinus very large ; the other, near 
the umbilicus, small, the intervening saddle placed on the greatest 
convexity of the volutions. Siphuncle suhcentral. 
The general form of this Nautilus is like that of Ammonites 
Fittoni (d^Archiac) and Am. splendens (Sow.), both of which 
* Read before the Geological Society of London, 15tli December 1847. 
