Having reached full growth and development
The full-grown creature is too strong for a man's body.
This would leave no time for the growth of his myth.; and his myth was, as is evident from what we have already said and quoted, full-grown in the first half of the 14th century.
When full-grown the entire length of the animal is about 4 ft., and the girth 3 ft.
It is most abundant in large full-grown insects, while in very young specimens no cantharidin at all has been found.
Such movement is more frequent in young mussels than in the full-grown.