ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
395 
T. flavicollis and T. lucifugus), and Dinenympha gracilis Leidy (emend.) ; 
probably = Pyrsomympha vertens Leidy ( pro parte), in T. lucifugus ; of 
Pyrsonymphidae, there are two — Pyrsonympha flagellata Grassi (in T. 
lucifugus ), and Holomastigotes elongatum g. et sp. Grassi in the same. 
It is remarkable that none of these were seen encysted or clearly in 
process of reproduction. They all ingest solid particles of wood, except 
the last named ; and it is the only one without the rods and rodlets which 
probably serve as an endoskeleton for the support of the cell and pro- 
tection of the nucleus. These parasites may aid in digestion ; they die 
or disappear in individuals fed with saliva ; and it is only when they 
disappear that the gonads of the Termite mature. 
Regeneration of the Micronucleus in Ciliata.*— M. Felix Le 
Dantec has experimented with portions of ciliated Infusorians which 
contained the macronucleus or a fragment thereof, but no trace of 
micronucleus. He does not regard his results as quite conclusive ; 
but, in some cases at least, it seems as if a new micronucleus could be 
formed within artificially produced pigments (merozoites) which con- 
tained no trace of the original micronucleus. 
Experimental Study of Coccidia/f — M. Louis Leger has made some 
experiments in order to test his theory that the primitive Coccidian 
sporozoite has not a dimorphic development resulting on the one hand 
in Eimeria and on the other hand in Coccidium ; but that it exhibits a 
continuous cycle leading to the formation of Cystozoites (sporozoite 
of Eimeria according to other authors), and continuing into sporocysts 
(or cysts with lasting spores). 
Starting from the fact that the adults of Scolopendra cingulata usually 
contain a polysporous Coccidian (Adelea dimidiata Schneider) and 
numerous groups of Eimerian sporozoites, while the young are but 
rarely infested, Leger took two young forms which seemed to bo free 
from parasites, and made them swallow cysts of Adelea in a state of 
perfect maturity. After 25 days one was sacrificed, and showed a mid- 
gut crowded with Eimerian sporozoites free or in groups ; the second 
specimen, killed twenty days afterwards, showed young forms of Adelea 
already furnished with a protective sheath. 
The experiments show the specific unity of Eimeria and Adelea. 
They also confirm the view that the primitive sporozoite, issuing from 
a cyst of Adelea, gives rise first to Eimerian cysts whose sporozoites 
afterwards become the cysts of Adelea or sporocysts. The results also 
explain why Eimeria should be abundant in Myriopods in spring, and 
Adelea in autumn ; they are stages, not different forms. 
The sporozoite of Coccidia probably corresponds to the Gregarine 
sporoblast, and the coccidian sporocyst to the octozoic spore of Grega- 
rines.. Perhaps the difference in the cycles is due to the absence°of 
sufficient nutritive material in the Eimerian cyst of Coccidia, whereas 
in Gregarines the cyst is abundantly furnished with reserves which are 
amply sufficient for the further development of the sporoblasts. 
New Type of Sporozoa-J— MM. F. Mesnil and E. Marchoux describe 
Coelosporidium chydoricola g. et sp. n., which they regard as intermediate 
* Comptes Rendus, exxv. (1897) pp. 51-2. f Tom. cit., pp. 329-30. 
X Tom. cit., pp. 323-6 (6 figs.). 
