Films/ Villanueva, Zacatecas

I found an ancestor on the IGI with a reference to Santa Maria Mecatabasco, Villa Del Refugio, Zacatecas, Mexico. In checking the "films," on ranchos I found the Batch Number and Film listed in the Villanueva, Zacatecas section, with the following....

Baptism (Malpaso) 1861-1869 1094628 C605391
Baptisms (Malpaso) 1764-1846 1092946 C601071
Baptisms (Malpaso) 1796-1813 1092949 C601073
Baptisms (Malpaso) 1846-1872 1092947 C601072

Will someone please explain what (Malpaso) means, it's not listed in my Spanish Dictionary. Are these four films in poor condition and difficult to read?

Pat Silva Corbera
Tracy CA