II. HERNIÆ 487 Congenital herniæ 487 Perineal hernia of young pigs 487 Umbilical hernia 488 Acquired herniæ 489 Hernia of the rumen 490 Hernia of the abomasum 493 Hernia of the intestine 494 Treatment of herniæ 495 Diaphragmatic hernia 496 Eventration 499 Fistulæ of the digestive apparatus 500 SECTION VII. GENITO-URINARY REGIONS. DISEASES OF THE URINARY APPARATUS 502 I. POLYPI OF THE GLANS PENIS AND SHEATH 506 Inflammation of the sheath 506 Persistence of the urachus 508 II. DISEASES OF THE BLADDER 511 Acute cystitis 511 Chronic cystitis 513 Urinary lithiasis. Calculus formation 514 Calculi in bovine animals 515 Urinary calculi in sheep 518 Paralysis of the bladder 519 Eversion of the bladder 519 Hæmaturia 520 III. DISEASES OF THE KIDNEYS 527 Congestion of the kidneys 527 Acute nephritis 528 Chronic nephritis 530 Hydro-nephrosis 531 Infectious pyelo-nephritis 533 Suppurative nephritis and perinephritis 537 The kidney worm (_Sclerostoma pinguicola_) of swine 539