Nazir Chapter 5, Mishnah 2. This mishnah is almost identical to the previous one; it simply adds further examples of hekdesh made in error - cases in which a person consecrates something based on a mistake.
The first case - a gold dinar:
The words of the mishnah: "Dinar zahav sheya'aleh b'yadi rishon harei hu hekdesh, v'he'elah shel kesef" - a person declared that the first gold coin that came up in his hand would be hekdesh. He assumed a gold coin would come up first, but in fact a silver coin came up in his hand.
Beis Shammai say it is hekdesh - even though his intention was for a gold coin, and a silver coin came up instead, the silver coin is consecrated.
And Beis Hillel say it is not hekdesh - because this is not the item he had in mind to consecrate.
The second case - a barrel of wine:
The words of the mishnah: "Chavis shel yayin sheta'aleh b'yadi rishonah harei hi hekdesh, v'he'elah shel shemen" - the person believed that the first barrel to come up in his hand would be one of wine, and he declared that it should be hekdesh, but in fact the barrel he brought up turned out to be one of oil.
Beis Shammai say it is hekdesh - even though his intention was to consecrate a barrel of wine and not a barrel of oil.
And Beis Hillel say it is not hekdesh - the first item that came up in his hand, the one about which he declared that it should be hekdesh, was oil and not wine, and this is not what he had in mind.
Why these additional examples are brought:
The commentators explain the purpose of these cases: the previous mishnah dealt with kedushas haguf - items that carry intrinsic sanctity, such as an animal designated as a korban. The items in this mishnah, by contrast, carry only kedushas damim: their monetary value alone is consecrated, and not the item itself. The mishnah thereby teaches that the laws of hekdesh made in error apply to both types of consecration.
In summary: in this mishnah we learned two further examples of hekdesh made in error - a gold dinar in whose place a silver coin came up, and a barrel of wine in whose place a barrel of oil came up. In both cases Beis Shammai say it is hekdesh and Beis Hillel say it is not hekdesh, and the mishnah comes to teach us that the dispute applies both to kedushas haguf and to kedushas damim.