360 ANIMAL REPRODUCTIONS. 
The reproduction of a third head was an- 
nounced by four or five fhort protuberances, 
where the large left horn, bearing three black 
points, or very minute eyes, was alone vifible, - 
‘The whole is magnified, fig. 21; the three eyes, 
a,b,c. Two, inftead of being at the extremity 
of the horn, were on the fide ; one, a, more evi- 
dent than the other, 4, and the third was a little 
below the other two. It was impoflible io dif- 
cern the optic nerves through the flefh, for the 
reproduction was yet in an early ftlage. Under 
the horn were two protuberances, p, the nature 
of which could not be known; but IL fhall con- 
tirtue my obfervations on thefe large fnails, and 
give the fequel in another Memoir. 
