Cat lung: alveolar type II cell, with arrows to three profiles of endoplasmic reticulum which have a structure not typically found in alveolar type II cells of common laboratory species (mouse, rat). These are rounded and it is not actually that hard to see some striations in them, particularly the one on the most left.  In a series of micrographs from untreated cats (taken incidentally from other studies) no sturctures with highly visible layering in the RER were seen, which doesn’t mean these profiles are not surfactant proteins, it just means that they are not organized as seen in ferret guinea pig and dog alveolar type Ii cells in other studies. negative 7268, 24564, cat #3, untreated (gender?, age?)