Tasmanian Devil (_Sarcophilus ursinus_). Inactive and rather on the decline for several months. Chronic diffuse nephritis with acute interstitial exacerbation. Calculi in kidney pelvis. The kidney size is normal, shape irregular, capsule smooth, strips easily leaving a rough mottled green-brown surface. Consistency is soft, tough, resilient. Cortex slightly wide, medulla normal. On removal of capsule the surface is found very irregular and elevations from the surface are pale red gray-green color. These elevations do not correspond with any change in cortex on section. Section is smooth, solid, markings not clear but glomeruli are distincter than striæ. Line between cortex and medulla obscure. The left kidney contains sand-like calculi, possibly uratic, as there are some pale areas near point of pyramid which are firmer than rest of tissue and rather gritty. Microscopic section of kidney shows the architecture much disturbed by connective tissue overgrowth in outer layers of medulla and inner layers of cortex and following the medullary rays to the capsule. Tubules are compressed and distorted in the vicinity mentioned. Epithelium is elsewhere low, opaque and granular. The connective tissue about the glomeruli is thickened and hyaline as it is in most other places. Tufts are not yet compressed. Following medullary rays there is a recent round and polynuclear infiltrate both around and in tubules. A Golden Cat (_Felis temminicki_) presented sand in the urethra, which had caused a traumatic urethritis and distention of the bladder. There was no evidence of renal urate collections, but a low grade prostatitis existed so that the bladder might have been distended before the urethra became inflamed, thereby giving opportunity for sand to form or to have arisen in the prostatic ducts. Three birds, a Bunting (_Passerina ciris_), a Bulbul (_Chloropsis aurifrons_), and a Buzzard (_Buteo albicaudatus_), had large cloacal urate calculi which could obstruct the ureter but had failed to do so; one had an acute ascending pyelonephritis, however. Excessive urate collections in ureters and kidneys occur all through the avian orders and in about the same percentages; meat and fish-eating birds have practically no cases, however. The condition seems at times the only finding at autopsy, or it may be associated with uratic serositis. Gout of birds is commonly accompanied by it, but need not be since two of the best examples of this disease had practically normal kidneys.