STREPTOCOCCI IN COMPARATIVE PATHOLOGY. 
783 
ally developed in long chains which hung together, forming 
flocculi in the clear liquid. It did not coagulate milk and failed 
to grow on gelatin or potatoes. It is interesting to note that 
here, as often in other cases, these streptococci appear in short 
chains in the tissues, but as long, winding ones in bouillon cul¬ 
tures. 
A study of the cultures made from the umbilical vein 
showed that there were two staphylococci, three undetermined 
bacilli and B. coli communis associated with the streptococcus. 
It is at least interesting to note that of all these bacteria the 
streptococcus was alone able to resist the action of the tissues, 
and through metastasis became localized in the joints. 
III. A Case of Septic Pnemnonia and Pericarditis. —In the 
spring of 1897 ahorse which had been operated upon for rear¬ 
ing died a few days subsequently. The post-mortem examina¬ 
tion was made the same afternoon. The pericardium and the ceph¬ 
alic portion of the left lung were covered with a grayish, pasty 
exudate. In the mediastinal space there was a considerable 
quantity of the same kind of material. The lungs were both 
hypersemic and in the left one a considerable area of hepatiza¬ 
tion. The abdominal organs were not appreciably changed. 
Cover-glass preparations made from the liepatized lung and 
the exudate showed a large number of streptoccocci for the 
greater part in short chains. Bacteria were not found in simi¬ 
lar preparations made from other organs. A number of tubes 
of media were inoculated with the exudate blood, hepatized 
lung, spleen and liver. All media inoculated with the exudate 
and lung developed into pure cultures of a streptococcus. All 
of the others remained clear. 
This streptococcus grew in long chains which appeared in 
flocculi, leaving the bouillon clear. It was exceedingly deli¬ 
cate and failed to develop in subcultures which were made a 
few days later. Morphologically it did not differ from the one 
obtained from the peritoneal exudate (Case 1). 
IV. Streptococci in Epizootic Diseases of the Horse. —Strangles 
is perhaps the best known of these. A number of investigators 
