Note:  Do not rely on this information. It is very old.


Nautiloidea, the sub-order of Tetra-branchiata Cephalopoda (q.v.), of which Nautilus is the typical and only living member. It differs from the other sub-order Ammonoidea (q.v.) in that the sutures or lines that mark the division of the separate body chambers are usually simpler and less folded than in the latter group; the siphuncle, moreover, passes through the centre of the septa and is protected by a back growth from this, forming a collar. In addition to the living Nautilus, the order includes a large number of extinct forms, and dates from the Upper Cambrian period.

“Let us not give up meeting together, as some are in the habit of doing, but let us encourage one another – and all the more as you see the Day approaching.”
Hebrews 10:25