Penis
Domestic cats have barbed penises, with about 120–150 one millimeter long backwards-pointing spines. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation. Lions also have barbed penises. Male felids urinate backwards by curving the tip of the glans penis backward. When male cheetahs urine-mark their territories, they stand one meter away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward.
Catopithecus
CGM 42222 is the specimen in which the outline of the braincase was best preserved. After adjusting for potential distortion caused by crushing, a brain model was prepared that determining the approximate volume of the brain of CGM 42222 to be 3.1 cm ± 10%.4 Using the estimations of brain volume and body weight an encephalization quotient (EQ) was calculated that showed the brain volume to body size ratio of C. browni is small compared to extant anthropoids of similar weight.