The gemara in Megilla asks, how do we divide up the reading on Rosh Chodesh among four people without violating one of the rules of reading. Those rules prevent beginning or ending an aliya within three verses of a parsha...
The first topic is the mishna's ruling that one who is called to the Torah should not read less than three pesukim. We go to the beginning of the gemara, which is the fourth line of 24a.
We concluded our shiur last week with the gemara's explanation of why it is that we silence one who inserts into his prayer the idea that God's mercy extends to birds through the mitzva of shiluach haken. We pick up with the 15th line of 25a, which continues this theme: