Affections of the penis are limited to phimosis and occasional inflammations on a traumatic basis. The latter is best seen in carnivorous animals like raccoons and coatis, but has little pathological interest. Two cases of phimosis have been seen at the autopsy table and one in an animal (hyena) still living. The last was operated upon some years ago and has given no trouble since. The prepuce of this beast is seldom retracted, but no swelling or retention of urine has occurred. A Red River Hog (_Potamochœrus porous_) dying of a variety of lesions, was found to have contracted preputial opening, the edges of which were tight and adherent to the glans penis at various spots. The prepuce had been dilated with urine to a large size from which collection the fluid could be pressed dropwise only by considerable pressure. Opening the sac revealed forty to fifty gray white sand granules about the size of millet seeds. A gray fox (_Canis cinereo argenteus_) had a mild grade of phimosis; in this case probably traumatism had some etiological relation, for it is the one referred to before in which a terminal urethral stricture was followed by rupture of the bladder. The testes have been peculiarly free of disease, only a small number of lesions having been found. A raccoon had an acute inflammation, traumatic in origin, and a few passerine birds were noted as showing involvement of this organ in the presence of some general infectious diseases. Two tumors were found in birds, none in mammals. The avian cases both occurred in Red shouldered Parrakeets (_Palæornis eupatrius_) and were round cell sarcomata, without metastases. Acute inflammations of the prostate and Cowper’s glands occurred only once as secondary to pelvic infection. Chronic change was observed in these bodies on two occasions, and prostatic hyperplasia, commonly called hypertrophy, was seen thrice. The mammalian prostatic area is known to become overfilled with secretion and to be affected by inflammation when it is not discharged. This occurred in a wood rat (_Neotoma pennsylvanica_) and a wild boar (_Sus scrofa_), the former having the condition so marked that prostate and seminal vesicles were swollen backward into the pelvis like a tumor. Histologically one finds in these conditions an engorgement of the glandular and ductal spaces with a mucoid substance and a mild round and plasma cell infiltrate in the connective tissue; there are no marked evidences of active inflammation. The testes were not abnormal in these cases. The three cases of “hypertrophy” of the prostate are worthy of separate record. Indian Paradoxure (_Paradoxurus niger_) the prostate is greatly enlarged, of pale orange color, soft and does not exude pus on section or pressure. Common Opossum (_Didelphys virginiana_) The prostate is enlarged, soft, gray-yellow. Urethra contains a little gray mucus but seems patulous. Seminal vesicles negative.