Help: Indice #10- what does that mean?

Hello Everyone,

I am very new to this group. Help Please!

I think I may have located my grandfather's christening at the Family Search >Mexico>Zacatecas>Momax (Bautizo). I found his name at the front of the book and it stated Delfino Alvarez Pag. 10. I went in to page 10, I searched under his birthdate too and could not find it.
How do I locate the record as stated in the index?
Here is the link:

https://familysearch.org/pal:/MM9.3.1/TH-1-15206-2660-73?cc=1410092&wc=6834192

Any advice greatly appreciated. I am so excited. :)

Thanks,
Pauline