Who called the meeting in Chapter 8?

Jack called the meeting in Chapter Eight.

As though he were serenading the rising sun, Jack went on blowing till the shelters were astir and the hunters crept to the platform and the littluns whimpered as now they so frequently did. Ralph rose obediently, and Piggy, and they went to the platform.

“Talk,” said Ralph bitterly, “talk, talk, talk.”

He took the conch from Jack.

“This meeting—”

Jack interrupted him. “I called it.”

“If you hadn’t called it I should have. You just blew the conch.”

“Well, isn’t that calling it?”