1884.] Infusoria from Putrid Waters. 137 
in shape and size are abundant. The length of the zodid imme- 
diately after emergence is d inch, at maturity, 4, inch. 
€ species seems to be not very susceptible to the deoxygen- 
ation of the water, thriving and multiplying where more sensitive 
infusoria would soon die. But when the supply of oxygen be- 
comes too limited for even its small demands, the second form of 
reproduction, that of sporular subdivision of the entire body 
takes place. The zodid assumes a spherical shape as before, but 
now prepares a distinct and substantial cyst in which the subdi- 
vision is accomplished. I have witnessed the formation of these 
cysts in very many instances, the completion of the process once 
only. The cyst wall was then suddenly ruptured and the motion- 
less and finely-divided contents thrown out by the collapsing sac, 
but to my regret were almost immediately lost amid the surround- 
ing clouds of bacteria. 
The movement of the infusorium when first placed on the 
slide, is rapid and erratic, with rotation on the longitudinal axis ; 
when quieted it is irregularly forward, or in wide circles, usually 
with one or the’other lateral surface downward, thus placing the 
oral aperture, as already mentioned, apparently upon the side. 
_ The following may be taken as a description: 
TILLINA SAPROPHILA, n. sp.—Body flexible, obliquely grooved, subreniform or 
-shaped in profile, length once and one-half to twice the width ; when viewed 
y, ovate, wider and somewhat inflated posteriorly, tapering and pointed ante- 
Size and dorsal convexity increasing, the ventral concavity lessening with 
Tiorly ; 
dies; nucleus spherical, dorso-central; con- 
vesicles several or single, posteriorly situated; anal aperture not observed. 
etal body > T000 to -Lyinch. Habitat, the putrid liquid of animal macerations 
Su water from the Delaware river. 
This species conspicuously differs from Tillina magna not only 
form and size but in the possession, by the latter, of a poste- 
Morly-developed lobate process, an elongate-ovate anteriorly- 
e e a single contractile vesicle and a larger pharynx. 
that an animalcule to a Chinaman is a great leap, and one 
at aga nature would take longer to make than the writer is 
va ka taking. But Charlie Lee is a genial little Chinaman 
oo keeps a laundry and sleeps: on a shelf, who intends, 
haa returns to the Flowery Kingdom, to have “a big blick 
= œ With tlees in flont.” He has started a new “ craze” in this 
in 
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