ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
649 
New Cancer Parasite.* — Under the name JEtJiopalocepJialus carcino- 
matosus g. et sp. n. Kor., Prof. A. Korotneff describes a new parasite 
which he has found chiefly in Carcinoma labii, but also in cases of 
Carcinoma mammae, maxillae, &c. 
The adult form which receives its name from its somewhat club- 
shaped appearance, is an elongated ribbon-like body, with thickened head 
in which is a nucleus of variable contour. The outline of the animal’s 
body is well defined ; there are no pseudopodal extensions of the plasma, 
which is finely granular. In its more youthful state the parasite is found 
to inhabit the central portions of epithelial nests, and is less elongated 
and more rounded, and, according to the illustrations, exhibits from one 
to four nuclei. 
The developmental cycle is fully described. Starting with a cocci- 
dioid form, larvae or “ zooids ” are found within the interior. The 
zooids are elongated ovals in shape. Besides the zooids other off- 
spring, sporozooids, are developed ; these are crescentiform bodies, 
consisting of a hyaline investing membrane and protoplasmic contents. 
The subsequent career of the zooids is either to penetrate a cancer 
cell and there assume the Gregarine adult form, or become an encapsuled 
coccidium. The sporozooid phase, however, seems to remain free at 
first, and is observable between cells as a granular nucleated body 
chiefly distinguished by its pseudopodial extensions. After a time, not 
only may zooids but sporozooids be observed in its interior. The 
zooid always is metamorphosed into a coccidium, the sporozooid into an 
amoeba. 
The organism described forms a bond of connection between the 
Coccidia and Gregarinida, the free amoeboid and encapsuled forms point- 
ing to the Coccidia, the adult condition possessing characters more akin 
to the Gregarinida. 
According to the author the true reason why the amoeboid form has 
not hitherto been easily discovered is the method of preparation. If the 
specimens be treated with sublimate and cut by hand, the appearances 
described by him are easily observed. 
* Centralbl. f. Bakteriol. u. Parasitenk., xiii. (1893) pp. 373-80 (15 figs.). 
