[ 6oo ] 
ADDENDA to the preceding Taper. 
Extract of a Letter from the Rev. Dr. Lyttelton 
to C. Mortimer, Secret. R. S. 
T HE Rev. Dr. Shaw , of Oxford, has procured a 
Specimen of the extended Eruca. As the Fof- 
filifts differ’d in their Opinion of this Dudley Fof- 
fil, feme pronouncing ir an Eruca , others a Bivalve , 
I thought it beft to leave the Reader to judge for 
himfelt from the Engravings ; but, as we arc now 
able to add a Specimen of this Foil'll in an extended 
Pofture, there is a better Pretence to call it an 
Eruca. See Tab. I. Eig. 6. 7 . and 8. 
XV. Some further Account of the before- men - 
tiond Dudley Fodil^ by the Editor of thefe 
Tranfa&ions. 
HE Rev. Dr. Tocock, F. R. S. was fo obliging 
as to fend feveral Specimens of this FofTil to 
the Trefident--, who put them into my Hands, and 
deftred me to draw up an Account of them to be 
annexed to the preceding Paper. 
The firft Specimen is a Mafs of Stone containing 
the Face and Eyes, with fome Rudiments of Legs 
on the Sides ; but the Back is intirely broken away. 
Another Specimen contains the Head only : A third, 
the Head, and Part of the Back, but greatly diftorted. 
But the moil beautiful and complete are the two 
which 
