The fissure patterns of 112 cat brains were examined and 45% were found to be asymmetric with respect to Otsuka and Hassler sulcus pattern types. As well, 22% were asymmetric with respect to the presence of a postcrutiate sulcus. No relationship was found between the presence or asymmetry of specific cortical features and paw preference, suggesting that these asymmetries are not associated with a functional asymmetry in visual discrimination performance previously demonstrated in the cat.