What is this heraldic charge?

[Zaphod99]

Shield and accompanying memorial text attached.

I can't find it in my (ancient) Debrett's.  I don't know if the circular object in the centre is part of the shield or just a fixing.

Zaph

[GrahamSimons]

Found with respect to a different person of the same name
Gules three lions’ gambs erased argent

[KGarrad]

I think Gamb(e)s means legs?

The arms of the Isle of Man are emblazoned in French.

Three legs conjoined in the fesse points in armour proper, garnished and spurred or--Insignia of the ISLE OF MAN.
    [The motto belonging to these insignia is QUOCUNQUE JECERIS STABIT.]
    LE ROY DE MAN de goules a treys gambes armes o tutte le quisses et chekun cornere seyt un pee


Quoting from Parker's:
Gambe, or Jambe: the leg of a beast. If couped or erased at the middle joint it is not a jambe but a paw.

A GLOSSARY OF TERMS USED IN HERALDRY
by JAMES PARKER
FIRST PUBLISHED in 1894

https://www.heraldsnet.org/saitou/parker/index.htm

[hanes teulu]

https://www.heraldicdesign.com/docs/complete_guide_heraldry.pdf

[Zaphod99]

Thank you all. I would never have guessed that's what it was. I can see it now as a paw with claws. Initially I thought it was a prawn.  I think gambe is probably from the same root as the French word jambe meaning leg.  (Not to be confused with gambas meaning prawns.).  I have the Complete Guide To Heraldry, on my bookshelf, and the good thing about a book is you can flick through it looking for something, not that I managed to find it of course.  The good thing about a PDF is that it doesn't break your foot if you drop it.

I think the herald or the painter had probably never seen one before.

So is the object in the middle, a fixture or a feature?

Zaph

[KGarrad]

The blazon says:
Newdegate (Newdegate, co. Surrey; Thomas Newdegate,
Esq., of Newdigate, Gu. three lions' gambs erased ar. Crest—
A fleur-de-lis ar. Another Crest—A lion's gamb erased ar.
Anothtr Crest—A swan ar. beaked and membered gu. gorged
with a ducal coronet or, thereto a chain affixed, and reflexed
over the back vert. Anothtr Crest—A horse courant az.
flames of fire issuing from his nostrils ppr. Motto—Confide
recte agens.

[David Nicoll]

A cadency mark or similar?
Badly drawn Crescent or Annulet?
A difference of some form anyway.

[SiGr]

My Latin is not up to much but I think the "filii secundo" means second son. This would support David Nicholl's suggestion that it is a cadency mark because the mark for difference of a second son is a crescent.

[Viktoria]

It might be a Crescent, but that would be with the opening at the top,Increscent is with the opening to the left, Decrescent with the opening to the right.
Yes ,the Isle of Man “ Which ever way you throw me I stand” .
Viktoria.