6 THE MICROSCOPICAL NEWS. 
THE STRUCTURE OF THE CHARAGIZ 
By CHARLES BAILEY, F.L.S. 
A Paper read before the Leeuwenhoek Microscopical Club, Manchester, 
27th October, 1882. 
( Concluded from page 353. Vol. 2.) 
VII.—SrRucTURE OF THE OOSPORE. 
We must now turn to the oospore, which is a more simple organ 
than the antheridium. In its early stage, and prior to fecundation, 
it takes the shape of a little spiral tower, surmounted by a crown, 
but when quite ripe it becomes ellipsoidal in Chara and nearly 
globular in Nitella. 
TT ce 
as 
—— 
aD 
SSE 
— oom am a 
—— f Mi \\ = 
\ = 3 = MX 
\ = a Et rv; NS 
N LE <—_ - 
~ = a: < = a 
a ——— yy \ 
SSS 
~ 
Fig. 9. Fig. 10. 
It is invested by an envelope composed of five tubular cells, 
which may be regarded as five leaves cohering by their sides, and 
arranged spirally round the oospore; the limits of these tubes are 
clearly marked on the ripe shell by bands or raised lines. In their 
earliest stage they contain chlorophyll which in the progress of 
growth becomes changed into a brown or black lignified substance, 
whose nature has not yet been determined ; their surface is mostly 
