1084 Notices of some new Parasitic Infusoria. [November i 
bordered granules are noticeable within the body, but if theyar | 
of external origin their mode of entrance is unknown. 
Although existing in such ‘profusion I have observed ther | 
reproduction in but a single instance. The cause is probably tie | 
ease with which they lose their health in water. They are tem | 
cious of life, however, individuals living for twenty-four hous | 
within a rectum in a life-slide, but water does not agree with 
them. Multiplication took place with amazing rapidity. A do | 
of sarcode separated from the posterior extremity of the body 1 
quickly followed by another, both immediately assuming a sphe f 
cal form and both almost immediately rupturing and with me 
force shooting out a zodid less than one-fourth the parent's sit . 
and with the undulating membrane less developed, but otherwise 
resembling it. Fission, encystment, rupture and escape were all | 
accomplished in less than’two seconds. I have witnessed this but 
once, as stated, yet before seeing it I had repeatedly observed at 
_act whose significance I failed to appreciate until it had ie 
examined in the reflected light of the completed process. Its 
that a portion of the posterior extremity of the animaleule fre 
quently becomes separated, but immediately uf 
dergoes disintegration or diffluence, and pil | 
bly represents an attempt at reproduction T 
incomplete by unpropitious surroundings. a 
multitudinous young are much sale | 
adults, more spindle-shaped and more ©" i 
Fig. 2 represents the mature endoparastt 4 
magnified 1100 diameters. ; a ] 
EXECHLYGA (efeyys, projecting PT ; eee ar "i ; 
gen. nov.—Animalcules free-swimming, ul aced 08 
we 
along one lateral border mi në ! 
ing the zodid longitudinally and projecting as esicle abse 
rior extremity; oral aperture none; ' 
Habits, endoparasitic. 
Exechlyga acuminata, sp. nov.—Body Ke ted anteriot 
rounded posteriorly, tapering to the somewa E E 
Fio. 2E xech. “PAFS length two and oime = é a : 
lyga acuminata, parenchyma often vacuolar, colorless; ® dulating 
gen. et sp. nov, as long as the body, subequal and fine; ua 
narrow, its margin apparently thickened, 
— usually conspicuous, and its posterior border terminating me fine 
~ to the zodid in length; internal rod-like body curved, anteriorly ; 
