860 
VERANUS A. MOORE. 
DESCRIPTION OF PRATES. 
Plate I. This represents six phases in the morphology of strepto¬ 
cocci. 
Fig. i. Long chains consisting of small segments arranged with 
equal spaces between them. 
Fig. 2. Rong and shorter chains in which the segments are arranged 
in pairs. The size of the individual segments is considerably larger 
than those in the long slender chains (Fig. i). 
Fig. 3. Short and longer chains where the segments are oval with 
the long diameter perpendicular to the long axis of the chain. These 
are less frequently encountered than the other forms. 
Fig. 4. Rong interlacing chains, also a number of chains forming 
a dense mass. Streptococcus conglomerate is a good illustration of this 
form. 
Fig. 5. Short and longer chains with one or more segments very 
much larger than the others. These enlarged elements frequently 
appear in short chains but they are rarely seen in long chains. 
Fig. 6. Chains showing branch and also division in two planes. 
This is a drawing of streptococais pyogenes taken from Crookshank’s text 
book. This form of division has been observed in a few cases in this 
laboratory but we have not recognized branching forms. The dividing 
in two planes is an exception which is not satisfactorily explained. 
Plate II. 
Fig. 1. Drawings from Zenoni’s article showing the changes occur¬ 
ring in the morphology of a streptococcus when cultivated on different 
media, (a) from bouillon, (b) from bloodserum-bouillon, and (c) from agar 
cultures. 
Fig. 2. A drawing from a cover-glass preparation of the pus from 
the knee joint of a colt suffering from omphalophlebitis. It shows organ¬ 
isms singly, in pairs, and short chains. 
Fig. 3. A drawing from a cover-glass preparation from a bouillon 
culture from the pus, same as Fig. 2. It shows both long and shorter 
chains, also one chain with division of a few segments in two planes 
and elongated segments. 
Fig. 4. A drawing from a cover-glass preparation from the udder 
discharge in a case of infectious mastitis. It shows streptococci in 
moderately long chains. 
Fig. 5. Streptococcus of strangles (after Kitt). 
(Figs. 1 to 4 inclusive magnified about 1000 diameters.) 
Plate III. So-called foot-rot in sheep. 
Fig. I. Photograph of the feet and left knee joint of sheep No. 1. 
Fig. 2. A photograph of the two left feet of sheep No. 2. From the 
fore foot pure cultures of the streptococcus were obtained. 
Fig. 3. A photograph of the bottom of same feet showing the sepa¬ 
ration of the claws due to a thickening of the interdigital tissues. 
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