PLATE LIII. 
diligent naturalists among those who have since attended to the in- 
ternal structure of the animal, having been unable to detect any 
omission of material consequence in that anatomical dissertation. 
The observations of Mr. Walsh and Mr. Hunter roused the curiosity 
of many. The Abbe Rozier entered at considerable length into its 
history, an account of which was published about two years after 
the joint papers of Mr. Walsh and Mr. Hunter appeared in the 
transactions of the Royal Society. Duhamel followed, and was 
equally assiduous in his investigations. And Spallanzani, beside 
some other ingenious observers, pursued the same enquiry. There 
is-also a very copious dissertation on the electric properties of the 
Torpedo, with strictures on the observations of Mr. Walsh and Mr. 
Hunter, by Mr. Cavendish, in the sixty-sixth volume of the Philoso- 
phical Transactions. To the writings of these respective authors 
we must refer the reader, desirous of more ample information con- 
cerning the anatomy of those organs, as we shall ourselves take leave 
of the subject, after relating some few particulars that have fallen 
from the pen of Lacepede respecting them. Those observations are 
not important for their novelty, but still deserve mention. This 
naturalist, proceeding to describe those parts of the Torpedo in which 
the galvanic faculty resides, explains the structure of those organs in 
toe following manner : — “ De chaque cote du crane et des branchies 
es t, un organe particulier qui s’entend communement depuis le bout 
museau iusqu’a, ce cartilage demi-circulaire qui fait partie du dia- 
Phragme, et qui separe la cavite de la poitrine de celle de l’abdomen. 
Cet orange aboutit d’ailleurs, par son cbt6 exterieur, presque a l’ori- 
hce de la nageoire pectorale, et est plus epais dans son cote interieur. 
Entre cet organe et la peau, on voit deux especes de bandes superposees 
*’une a 1’autre, dont la superieure, a fibres longitudinales, s’unit avec 
' r * Peau par le moyen d’un tissu cellulaire, et dont Tinferieure, a. fibres 
D 2 
