PART I,] Description of the Illustrations. 63 



FIGUBES. N08. 



The subsequent history of the amoebae (Ixxvi-vii) Ixxviii. 



Amcebfe creeping across the field and discharging their contents ,, 1 



Amoebae, which became circular, and active movement was set up among the aggregated 



molecules. A bright halo is seen to surround the globular mass „ 2 



The halo disappears and the contractile vesicle vanishes . „ 3 



The mass becomes broken up altogether „ 4 



Illustrating the changes which occurred in two solutions of organic matter obtained from the 



same source, placed on under two covering-glasses upon one slide ..... Ixxix-lxxxiii. 



Circular "yeast" cells and angnillulcB? which appeared in one of the preparations . . Ixxix. 



Developmental stages of a young paramecium .......... Ixxx. 



Corpuscles developed in the midst of a heap of minute molecules „ 1 



Growth of the corpuscles . „ 2 



A contractile vacuole becomes evident „ 3 



The animalcule after its escape from the corpuscle (3) „ 4 



Irregular outline assumed by the animalcule in a thick fluid „ 5-6 



The animalculae become encysted, and in this condition multiply by segmentation ; some are 



seen to exhibit contractile vacuoles, others not , Ixxxi. 



Plate XX, 



Developments in organic wlutiong. 



A young para»ieoiti7u getting out of the encysted condition . . ... . . . Ixxxii. 



Two encysted jyaramecia ; active movements were set up amongst molecules of the smaller 



one, and the cyst became detached from its fellow „ 1 



The molecular contents is seen to have assumed the form of an animalcule, which by its 



active movements caused the capsule to become attenuated ....... 2 



The escaped animalcule . . „ 3 



The remains of the cyst .............. „ 4 



A ruptured cyst — animalcule not escaped ........... Ixxxiii. 1 



Animalcule escaping, but is still enveloped by a delicate capsule (schleier') .... „ 2 



Empty cysts „ 3-4 



Segmentation into four animalcules has occurred in the cyst „ ,5 



After several encysting processes, a ciliated infusorium appeared on the slide . . . ,, 6 



Forms of life which developed in a cholera stool Ixxxiv-ix. 



The animalcule described as occurring in alvine discharges in the active and in the " still " 



condition Ixxxiv. 



Effect of the addition of carmine solution upon the above preparation, everything in the 



field being tinted pretty much to the same extent Ixxxv. 



"Yeast" cells which appeared in the midst of the foregoing on the third day . . . Ixxxvi. 

 Fertile filaments bearing Sporangia with spores ; the latter were readily distinguishable about 



the fourteenth day Ixxxvii. 



Plate XXI. 



Fungi developed in cholera discJiargv. 

 Earlier condition of Ixxxvii : the filaments are intersected by those of Penicillium . . Ixxxviii. 



Penicillium viride „ 1 



Penicillium glaucum ,, 2 



A more fully developed specimen of Ixxxvii. Some of the filaments are seen to present 



dilatations or macroconidia Ixxxix. 



Plate XXII. 

 Objects observed in moistened soil from Allahabad on third and succeeding days. 



Various stages of Monas lens principally ; observed in soil at a depth of four feet from the 



immediate vicinity of the newly-erected barracks xc. 1-8 



Minute Zoospores, together with animalculae in the "still" and active condition, precisely 

 similar to those described as being present in alvine discharges. Developed in moistened 

 soil obtained from the flooring of the Clydesdale Barracks at a depth of four feet . . xci. 



