A. C. Stokes—Fresh-water Infusoria. 45 
body-half near the left-hand border; contractile vesicles two, 
situated at the base of the tail- Ha projection, and contracting 
alternately. same of body gt> to x4, inch. Habitat—The 
surface of water-soaked twigs and decaying leaves at the 
bottom of shallow pools. 
Figure 5 represents this infusorian with the tail partially 
withdrawn, as most commonly seen ; figure 6 an outline of the 
same part ‘extended. Its movements are the most rapid, and 
its changes of form the greatest of any member of the genus 
yet met with. The body is very flexible, and is frequently 
twisted temporarily. 
The systematic position of the genus is probably near that 
of Blepharisma. 
Another animalcule collected in some abundance in one of 
the first gatherings of early ee — to have no recog: 
nizable generic resting-place. It may be characterized as 
ser Fie 
Ileonema, gen. nov. (Greek eileo, to twist; nema, a thread.)— 
Body | fault, -shaped, depressed, elastic, entirely ciliate ; flagellum 
single, inserted at the narrow anterior extremity, flexible but 
not vibratile, the basal half large, thick and apparently twisted, 
the distal half fine, thread-like; oral aperture terminal, perfo- 
rating the apex of the neck- like portion; pharynx distinct ; 
nucleus sub- -spherical or broadly ovoid, sub-central ; contractile 
vesicle single, posterior oeitte anal say i postero- -terminal. 
Lleonema dispar, sp. (fig. 7 ody transparent, granu- 
lar, flexible, flask- shapes Vengitodinally striate, the length 
about three times the breadth, contracting to a short ovoid 
form or extending until clavate; the ventral surface flattened, 
the dorsal convex and bearing a single longitudinally disposed 
row of short hair-like perpendicular sete ; cilia long and fine, 
thinly clothing the surface; entire flagellum one-half the length 
of the body, the basal half thick, obliquely grooved and present- 
ing a twisted or cord-like appearance, slightly tapering yet sud- 
denly constricted at the beginning of the finely filamentous 
distal one-half; oral aperture at the base of the flagellum; 
pharynx elon ate- fusiform, longitudinally plicate, apparentl 
composed of Scheie elastic, rod-like elements; nugleus us ovoid, 
sub-central; contractile vesicles two, postero- terminal, close to 
the anal aperture. Length of body 34, inch. Habitat— 
oe algee and decaying leaves at the bottom of shallow — 
ools. 
This bottle-shaped_ infusorian (fig. 7) was taken from among — 
those delicate alge which grow so abundantly in all ger! 
waters, and seem to cling like soft green clouds to lea = 
grass and fragments of sticks and twigs in the shallow waynide - 
pools of age spring. Its movements are evenly oe 
