Explanation of Plate 5. 



STREPTOCOCCUS LANCEOLATUS. Gamaleia. 



(Diplococcus pneunioniae A. Fraenkel.) 



(Pneumococcus.) 



I. Gelatin stick culture, ten days at 22. 

 II. Agar streak culture, four days at 37. 



III. Agar stick culture, four days at 37. Puncture 



canal. 



IV. Agar stick culture, four days at 37. Surface. 

 V. Agar plate, three days at 37. Natural size. 



VI. Agar plate, three days at 37. x50. Superfi- 

 cial colony. The dark colony is situated near 

 the surface. 

 VII. Agar plate, three day sat 37. X50. Deep-seated 



colonies. 



VIII. Gelatin plate, eight days at 22. The upper col- 



ony superficial, the two lower ones deep seated. 



IX. Smear preparation from pneumonia sputum. 



X 1,000. 

 X. Pure culture from agar plate three days old. x 



1,000. 

 XI. Microscopical preparation. 



(a) Diplococci, single and arranged in chains. 

 High magnifying power. 



(b) Diplococci surrounded with gelatinous cap- 

 sule. 



j/y 



XI. 



