Piercing mandibles, retracted within the head-capsule.
Also the notion that snakes when attacking are able to jump off the ground is quite erroneous; when they strike an object, they dart the fore part of their body, which was retracted in several bends, forwards in a straight line.
This seems to have been his last attempt; for, two years later, his Bibliography of Zoology shows little trace of his favourite theory, though nothing he had uttered in its support was retracted.
The 1st pair of appendages both in this and in C are retracted.
In 1333 he was sent for to Rome, where, we are told, he first maintained the pope's authority in cases of divorce; but this opinion he retracted.
