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Streptococcus lanceolatus. Gamaleia. (Diplococcus

pneumoniæ A. Fränkel.) (Pneumococcus.)
I. Gelatin stab culture, ten days at 22o.
II. Agar streak culture, four days at 37°.
III. Agar stab culture, four days at 37°. Stab canal.

IV. Agar stab culture, four days at 37°. Surface growth.

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

VI. Agar plate, three days at 37°. X 50. Superficial colony. The darker colony lies near the surface.

VII. Agar plate, three days at 37°. X 50. Deep colonies.

VIII. Gelatin plate, eight days at 22°. The upper colony is superficial; the lower ones, deep.

IX. Smear preparation from pneumonic sputum. X 1000.

X. Pure culture from a three days' old agar plate. X 1000.

XI. Microscopic preparations: (a) Diplococci as single pairs and in chains. Highly magnified. (6) Diplococci surrounded by gelatinous capsules.

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