A raccoon baculum.

The baculum in the chipmunks of western North America
The Mammalian Baculum: Hypotheses on the Nature of Bacular Variability
Baculum length and copulatory behaviour in carnivores and pinnipeds (Grand Order Ferae)
A Description of the Baculum and Os Clitoris of Eutamias townsendii ochrogenys
The Baculum of Dipodomys Ornatus and its Implication for Superspecific Groupings of Kangaroo Rats
Peptidergic control of the heart of the stick insect, Baculum extradentatum
Morphometric Variation and Function in the Baculum, with Comments on Correlation of Parts
On the evolution of the mammalian baculum: vaginal friction, prolonged intromission or induced ovulation?
The baculum in the Vespertilioninae (Chiroptera: Vespertilionidae) with a systematic review, a synopsis of Pipistrallus and Eptesicu...
It's all relative: allometry and variation in the baculum (os penis) of the harp seal, Pagophilus groenlandicus (Carnivora: Phocidae...