Fritsch, Obseryations on the young plants of Stigeoclonium Kütz, 387 
granule of the brownish-red matter, ocurring at the point of attach- 
ment of the young filament. 
Fig. 25. Swollen-celled creeping base, commonly met with in this species, 
Fig. 
Fig. 
Fig. 
Fig. 
26. 
27. 
28. 
Almost each celi has developed an upright branch. 
Plate XII (The magnification is mentioned for each figure). 
Figs. 26—29, Stigeoclonium nanum (Dillw. Kütz.) 
Young plant of the same type, as that shown in fig. 25. Again 
almost each cell develops an upright branch; at a one of these is 
branched immediately above its origin. (X 3%.) 
Thesame type as in Fig. 26. The cells of the base are very much 
swollen, as compared with those of the upright branches, of which 
there is one to each basal cell. (X 390.) 
Creeping basal portion, only one of whose cells has grown out 
into an upright filament; this is extendet into a short rhizoid below. 
On the lett isseen a group of protococcoid cells, from one of which 
this young plant has probably been derived. (X 420.) 
Two, considerably-branelched young plants, arising from a group ot 
protococcoid cells. (X. 4U0.) 
Figs. 30—32, Stigeoclonium variabıle Näg. 
In Figs. 30, 31 and 32 the base and the upright filaments are 
encased in a thick mucilaginous sheath. The cells of the base are 
living and rich in contents. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Ss. 
31. 
32. 
Basal creeping portion, terminating at either extremity in a rhizoid 
and developing two more or less upright branches. (X 420.) 
Basal creeping portion with a single upright branoh. (X 420.) 
9-celled base, from which a single upright filament arises.. Risa 
young rhizoid, which has been developed from one of the cells ot 
this flament. (X 420,) 
Figs. 33—36, Endoderma spec. (Jadinianum Hub.?) 
33. 
38. 
Individual seen in optical sektion. The filaments are seen to be 
endophytic, since they are enclosed by the cuticle of the Cladophora 
(X 360.) 
Endophytic filaments, growing below the cuticle of the Cladophor 
(X 2%.) 
Portion of the parenchymatous stratum, formed by the endophyte, 
seen in surface view. Cell-contents omitted. (X 290.) 
Portion of the endophyte, in which its filamentous nature is still 
recognisable, seen in surface view. In each cell a contracted 
chloroplast is apparent. (X 2%.) 
Figs. 37—38. Endoderma spec.? 
Shows optical section of the small-celled form, as well as surface 
view of the parenchymatous stratum. One of the epiphytic cells 
has grown ont into a Stigeoclonium-Alament. (X 420.) 
A similar form, treated with Eau de Javelle to make it more dis» 
tinct. Many of the epiphytic cells have grown out into filaments of 
Stigeoclonium. (X 42U.) 
