324 
makes it probable that fertilisation really takes place. However, it must be said 
that trichogynes with attached spermatia but with undeveloped auxiliary mother-cells 
Fig. 238. 
Callithamnion tetragonum var. fruticulosa. Procarps. To the right in B the auxiliary mother-cell which supports the ~ 
carpogonial branch. 4. B 270 :1. C 350 :1. 
Fig. 239. 
Callithamnion teiragonum var. fruticulosa. Ripe cystocarps. A 76:1. B 145:1. C 200:1. 
though of rather advanced age were in some cases observed. (These observations are 
communicated here because sporangia frequently occur on the same plants as the. 
