[ 6 7 * ] 
have ever had occafion to fee, and exceeds by many 
inches the longeft I have read of. So as we can 
plainly trace it ; it meafures two feet four inches and 
7-1 oths in length, as marked at letters A,B,C, ✓/. (Tab. 
xxii.)Fig\. It has originally been feveral inches longer, 
as you may eafily trace out by continuing the iTrait: 
lines, which terminate its edges, until they meet ill 
a point. Thefe fhells are of the concamerated kind, 
and in this fixty-fix partitions may be diftindtly 
counted, and it mu ft certainly have had a confidera- 
ble number more, which are hid by the end part 
being immerfed too deep in the marble. As the 
end of it does not appear, I have a r Fig. 2. reprefented 
the narrow extremity of a much fhorter, but very 
diftindt one, in the fame table, where feveral of the 
kind are to be feen, but none near fo long as Fig. 1. 
the longeft, as I remember, not meafuring above 
eight inches. In Fig. 2. at F, the liphunculus of one of 
the concamerations pretty plainly appears, and pro- 
bably all the partitions have originally had the lame 
as in the Nautilus. 
In the delign I here fend you, which I took upon 
the fpot, with a crayon, and have fince worked out as 
accurately as I could with Indian ink, I have pre- 
ferved the juft dimenlions of all that can be traced of 
this large fhell. The marble, in which it is immerfed, 
is of a coarfe grain, and of a dufky brown colour, 
interlperfed with a dirty white : of this colour the 
fhell itfelf is tinged, and all its concamerations filled 
with the ftaladtical matter of the marble. 
The concamerations or partitions of thefe follils re- 
femble thofe of the nautili, though it would be very 
improper to give them that name, for this fhell is 
4 Q^2 never 
5k- f h 
