54 



age, so tliat tlie sporogenous lobe is not a compact tissue 

 when young, "but a group of rounded cells (figs. 95,102), 

 There is aoiae evidence tliat in this case tlie method of cell 

 division in the sporogenous lobe is by constriction, some- 

 what after tlie manner of the second metliod of cell division 

 described on page 2-7 . The final result is the same in 

 the t\;0 cases, i.e., the production of branched chains of 

 carpospores. 



The sporogenous lobes of a, single c^'^stocarp e.re of va- 

 rious £.ges. Lobes with ma,ture spores may be seen by the 

 side of unicelli;lar sporogenous lobes, and usually all 

 stages of development may be seen ir a single cystocarp 

 (fig. 103). 



Each sjorogenous lobe is covered v/ith a gelatinous en- 

 velope, not easilj^ seen until sv/ollen v/itli glycerine or a 

 v/atery fluid. The individua,l spores seem to be ./itiiout a 

 cellulose v/all , being enclosed only by the liautsc jiiclit . 



As a rule, s,ll tlie spores of a single lobe become ma- 

 ture at the same time. The IjtiKs of the chains break at 

 the point where the calli.;s-like plugs are developed, the 

 cor;necting strands B^e drav.Ti into the body of tlie spores, 



and the -spores slip oi't of the gelatinous envelope and 

 float av/ay into the v/ater. 



