The space between the two halves of the shell widened?

The break between the top and bottom halves is called the middle of the inning.

You see, dear mother, I have rather a job between the two halves of myself.

From 1949 to 1967, travel between the two halves was practically impossible.

There is only one 15 minute break between the two halves.

I tried a knife blade between the two halves of the small window.

I had never been able to make peace between the two halves of myself.

But it showed so clearly how, in an argument between the two halves, the wolf usually won.

The interval between the two halves cannot exceed 15 minutes.

During the break between the first and second halves, the ice was not cleaned.