48 Veterinary Medicine. 



and body and rump, and the upper surface of the wings near the 

 root of the pin-feathers. The nodule at first firm and resistant, 

 soon becomes degenerated and forms a thick central yellow 

 debris in the now umbilicated centre. In pigeons may cause 

 suppuration or ulceration, with a foetid odor. Recovery may be 

 spontaneous, the nodules drying up, disintegrating, falling off 

 and leaving healing sores. In other cases disease extends, with 

 anaemia, emaciation and marasmus, to a fatal result. This is 

 especially so in pigeons when the disease extends to the mucosae. 

 They grow especially in the rete Malpighii, but also extend into 

 the follicles and gland ducts (follicular psorospermosis). Is con- 

 tagious from bird to bird by direct contact, by roosts, solid bodies 

 on which they rub the affected bill, etc., and by infected dust. 

 To fowls and pigeons by experimental inoculation (Pfeiffer). 



7>ffl/<f(/ successfully by the hot wire, by oil of turpentine, by 

 oil of tar. 



Buildings should be thoroughly disinfected by quicklime and 

 mercuric chloride. 



AMCEBOID DISEASE OF FEET, ETC., IN LAMBS. 



Protoplasmic masses in epidermic and epithelial cells in rete Malpighii, 

 lips, gums, nostrils, coronet. Suppuration, emaciation, death, or desicca- 

 tion, desquamation, recovery. Amceba princeps grows in water. Treat- 

 ment : Quicklime, cupric, or ferric sulphate, stibium chloride, oil of tar, etc. 



I,eudenfield found epithelioid concretions and growths on lips, 

 gums and nostrils and behind the hoofs in lambs. The rete Mal- 

 pighii was inflamed, proliferated, and thickened, the hypertrophy 

 extending outward to the horny layer and inward to the papillae 

 of the derma. Beneath this suppuration might be found and 

 the patient might run down and die, or the morbid product might 

 be dried up and thrown off, followed by recovery. 



Beneath the horny layer L. found granular nucleated masses 

 which he identified as Amoebae : these seemed identical with 

 A. princeps (Ehr.) of fresh water, and he supposed the lamb 

 contracted them from pools and mud holes. They could be cul- 

 tivated readily in water. 



