148 



yellowish fluid rich in albumen escapes which flows from the tumour as 

 water would from a sponge. The subcutaneous tissue is thickened and 

 separated from the' fascias of the muscles ; in it one observes the swollen 

 lymph vessels. The muscles (mm. cleido-occipitalis, subclavius hom. ; 

 pectoralis profundus, biceps brachii, and a small part of the m. sternoce- 

 phalicas) are distended by a similar jelly-like trembling tissue. The 

 muscles themselves are very moist, tough, and rich in connective tissue, 

 or spongy and with a characteristic appearance on the section. The fibre 

 bundles contain locaUsed yellowish-white cavities with gelatinous masses, 

 which send radial prolongations into the apparently healthy muscle tissue. 

 In other places one finds dense masses of connective tissue around large 

 thrombosised vessels. The following changes are frequent on transverse 

 sections. The perimysium internum is replaced by a spongy tissue, which 

 forces the primary fascules of muscles apart. In these layers of oedematous 

 tissue one observes long reddish-brown, frequently very sanguineus, stripes 

 and patches, or wavelike fines transversing the muscle. In such foci one 

 only rarely finds small thrombosised veins. The described haemorrhagic 

 stripes are regularly |- mm. to 1 mm. broad, but vary in length. Around 

 the streaks the tissues are apparently condensed, and whitish-yellow 

 discoloured. The healthy muscles next to the diseased ones do not show 

 any capillary haemorrhagies, whereas the affected ones appear dotted 

 with small red dots. In the musculus sternocephalicus the changes are 

 most pregnant, as the thickness of the modified subcutaneous connective 

 tissue is greatest here. Large thrombus or actually necrotic foci are 

 absent. The left praescapular gland is enlarged 18 X 6| cm. and of rigid 

 consistence. A large quantity of yellowish serous fluid, mixed with blood, 

 flows from the section. The capsule is thickened and infiltrated, its 

 spongy connective tissue is 2h cm. thick. The vessels entering the hylus 

 are thrombosised. The adjacent sinus of the lymph gland are very 

 haemorrhagic. The medulla is granulated and extruding, single yellowish 

 white points being prominent. The vena circumflexa scapulae is throm- 

 bosised, and appears as a thick black cord with greyish-whitish surround- 

 ings. The lungs are normal, the hver is soft and shows a slight stasis in 

 the vena porta ; the abdominal organs with the exception of the kidneys 

 are normal. The perirenal fat consists of a yellowish gelatinous mass, 

 the capsule is easily removed on section, the cortex is slightly oedematous, 

 glomeruh injected and shght hyahne degeneration. 



Pathological-Anatomical Diagnosis : Myositis serosa and haemorr- 

 hagica, thrombolymphangitis and plebitis, lymphadenitis haemorrhagiea, 

 nephritis parench}-matosa as consequence of intoxication with pleuro- 

 pneumonia virus. 



CASE 2. — Calf " Dalton," derived from a farm on which about forty 

 sucking calves and oxen died from pleuro-pneumonia in consequence of 

 prophylactic injection with collected pleuritic exudate. The strain was 

 very virulent, as was proved experimentally. 



