the reptilian testis and epididymis typically undergo seasonal recrudescence coupled to the breeding season. all reptiles retain their testes and excurrent ducts within the abdomen (testicond). generally, the reptilian epididymis does not exhibit the same degree of anatomical regionalization compared to scrotal mammals (figure 1). indeed, the anatomical appearance of the epididymis of many reptiles appears much more similar to the epididymis of monotremes than scrotal mammals (figure 1). anatomically, the gross morphologic features of the reptilian epididymis can vary between species, with some species of reptiles exhibiting just two anatomical regions whereas others (snakes) may exhibit no observable regionalization of the epididymis.