196 
IT. M. WOODCOCK. 
III. COMPARFSON OP THE NuCLEAR CONDITION InKaRYOEYSIS 
LACERTA^ AND CERTAIN OTHER IIvEMOGREGARINES WITH 
THAT OP COCCIDIA; THE QUESTION OF THE KaRYOSOME AND 
THE Intra-nucleae Division-centre . 
1 propose next to compare the nuclear conditioip as I have 
described it above in Karyolysus lacertse, with that 
whicli is found in certain Coccidia, at a particular period in 
the life-cycle, since, in my opinion, the agreement sliown 
affords an important indication of the close affinity and 
phylogenetic relationship of these two types of parasite, 
'riiis resemblance is especially marked in the case of the 
merozoites and very young schizonts of a Coccidian, which 
is, according to Shellack and Reichenow (32) really Bar- 
rouxia alpina, Leger; this phase, it must be mentioned, has 
for long been mistakenly included in the life-cycle of Adelea, 
ovata, of which it was considered to represent the male 
type of schizogony. The structural details of this particular 
stage or form of the parasite were first described by 
Siedlecki (33), and further notes with regard to it have since 
been given by, among others, Jollos (12), both these authors 
having included it in the cycle of Adelea.^ In order to 
facilitate the comparison with the Hmmogregariue, I have 
drawn (PI. 9, figs. 41-43; PL 10, figs. 1-3) some individual 
merozoites from an original preparation of my own, these 
parasites being easily obtainable in centipedes. Although I 
have found exactl}^ the same nuclear condition and behaviour 
in this early phase which has been observed by Jollos, I think 
it is worth while to describe it again, because doubts have 
been recently cast upon Jollos’ account, both as regards these 
points and others. 
At first the young schizont of Barrouxia, which may be 
‘ The two forms are parasitic in tlie same liost, Uthohius forfi- 
catus; this fact is, of course, chiefly responsitile for tlieir different 
phases having been confused together. 
