151 



and filled with many small cavities containing fluid. The muscle fascules 

 are separated and atrophic. The intramuscular tissue and the tissues 

 surrounding the trachea and oesophagus have the same lesions of pleuro- 

 pneumonia. In the musculus sternocephalicus, at 6-| cm. from the 

 sternum, is a necrotic locus of the size of a hen's egg. A reddish -yellow 

 compact mass of tissue is situated in the middle of a very humid tube 

 of muscle, which has all the various changes usual in myositis. A mixed 

 thrombus, 25 cm. long, attached to the wall, is situated in the vena 

 jugularis dextra. The musculus sternomandibularis is extremely haemorr- 

 hagic, the areas surrounding the blood vessels being especially con- 

 spicuous. The oesophagus is very oedematous, and its mucosa is loosened. 

 The mucosa of pharynx and larynx is swollen and covered with capillary 

 extasia. The retropharyngeal lymph glands are swollen, and dripping ; 

 so are the lymphoglandulae cervicales mediae et caudales. The right 

 praescapular lymph gland measures 12 X 4 cm. The capsule is 

 thickened, and the hylus vessels leading into is thrombosised. The sinus 

 are slightly dilated, the folhcles and folhcular trabeculae protude. The 

 yellowish jelly-like infiltration of the subcutis extends from the mandibula 

 along the neck of the tenth rib. In the omentum mains there are 

 irregular haemorrhages, the mucosa of the abomasus is swollen and 

 difiusely hyperaemic. The other parts of the stomach are normal. 

 Coecum empty, some haemorrhagic spots. Mesenterial lymph glands 

 swollen ; colon pigmented with a few calcareous parasitic nodules or 

 such containing pus. Ileum, mucosa slightly swollen ; jejuniim bloody, 

 jelly-like contents, and longitudinal stripes. Lungs in inspirium pleura 

 white. Severe oedematous infiltration of the mediastinum. On the 

 apex of the heart a few subepicardial ecchymoses. Kidneys, the capsular 

 fat slightly infiltrated, glomeruli injected. All joints, but especially 

 the left articulatio metacarpophalangea are swollen. The capsules are 

 distended by a light yellow shmy fluid containing flakes of fibrine. The 

 synoviahs only shghtly reddened, but thickened and folded. The surface 

 of the cartilages are everywhere intact. Some of the.. vaginae of the 

 tendons are dilated and filled with fibrinous exudate. 



Pathological- Anatomical Diagnosis: Myositis, synovitis, and tendo- 

 vaginitis serofibrinosa specifica. Intoxication by pleuro-pneumonia virus. 



CASE 7.— Heifer 674, injected with 2 c.c. boulhon culture at the tip 

 of the tail ; considerable swelhng of the whole tail ; skin hfted off up 

 to . the third caudal vertebra ; in places necrotic, and in others covered 

 with small abscesses. The left anal lymph gland is the size of a hen's egg. 

 The tail was amputated at the second vertebra and the gland extirpated. 



Macroscofically the amputated part showed a considerable thicken- 

 ing, the skin had peeled from the subcutis over a surface of 30 cm., the 

 hairs had fallen off in parts, and at the lower end of the tail they were 

 replaced by small holes filled with creamy pus. The tip was dry, leathery, 



