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PLATE 41.

Bacillus megatherium. De Bary.

I. Gelatin stab culture, twenty-four hours at 22°.
II. Agar streak culture, three days at 22°.

III. Gelatin plate, thirty-six hours at 22°. Natural size.

IV. Gelatin plate, thirty-six hours at 22°. X 60. Deep colony.

V. Gelatin plate, thirty-six hours at 22°. X 60. Superficial colony.

VI. Agar plate, four days at 22°. VII. Agar plate, one day at 22°. superficial; to the left, deep colonies.

Natural size.

60. To the right,

VIII. Agar plate, four days at 22°. × 60. To the right, deep; to the left, superficial colonies.

IX. Potato culture, five days at 22°. Natural size.

X. Microscopic preparation. Pure culture on agar. X 800.

XI. Bacilli with numerous flagella. × 1000. Stained according to Löffler.

XI.

PLATE 42.

Bacillus vulgatus. Migula. (B. mesentericus vulgatus Flügge. Potato Bacillus.)

I. Gelatin stab culture, ten days at 22°.

II. Agar streak culture, ten days at 22°.

III. Agar stab culture, six days at 22°. Surface growth.
IV. Agar plate, six days at 22°. Natural size.

V. Agar plate, six days at 22°. VI. Agar plate, six days at 22°. colony.

X 60. Deep colonies.
X 60. Superficial

VII. Gelatin plate, eight days at 22°. VIII. Gelatin plate, eight days at 22°. superficial colony.

IX. Gelatin plate, eight days at 22°. superficial colony.

Natural size.

X 60. Part of a

X 150. Part of a

X. Potato culture, five days at 22°. Natural size.
XI. Microscopic preparation. Pure culture from agar,

one day old. X 800. Stained with fuchsin.

XII. Bacilli with numerous flagella. × 1000. Stained according to Löffler.

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