244 ULOTHRICACEAE AND CHAETOPHORACEAE 
9, oe utriculosum. Young and mature filaments from a single col- 
Ka EN p. 18 
A mature ih filament (579). 
PLATE 26 (575: 1) 
1. Microthamnion Kuetzingianum. A plant = moderate size, showing zoöspore 
formation and cells evacuated by wage (532), p 
2. Mic ا تا‎ serictissimum, wer part a oon of moderate size, corre- 
sponding closely to Rabenhorst’ s Ls material (524), p. IQI. 
3, 4. End branches of the same. 
5. Énd branches from a short and slender form (613). 
PLATE OT (S75: 1) 
I. Microthamnion strictissimum macrocystis, Nearly all of a medium-sized plant 
(608), p. 192 
2. Microthamnion Kuetzingianum. A medium-sized plant (532). 
3, 4. Young plants (561 
PLATE 28 
f. ne lubricum. Middle portion of the typical form (638), p. 196 ` 
(350: 
2 on state, upper portion Gi 5 A) (350: 1j. 
3, 4. Myxonema lubricum varians. Formation of zoöspores (456), p. 198 
(575: 1). 
PLATE 29 (350: 1) 
Myxonema amoneum. Fig. 2 joins Fig. I at the point ا‎ >; there was an 
interval of six cells between Fig. 2 a Fig. 3 (558), p. 199. 
PLATE 30 (350: I) 
Myxonema sububigerum (374), p. 200. 
PLATE 31 (350: 1) 
onema ventricosum. The small figure joins the main stem twenty cells be- 
low 7 359), p 208. 
PLATE 32 (350: 1) 
I. Myxonema tenue. The main stem, drawn with the wee slightly too great 
in comparison with the other figures in this genus (615 B), p. 
2. Setiferous state, a branch from near the summit ici. 
PLATE 33 (350: 1) 
و سس‎ Lower part of a plant ; Fig. 2 joins Fig. I at the point 
Sie X (463), p 
pper part p Su plant (654). 
45: Myxonema lubricum varians. A portion from the upper part of a plant ; 
the Pe is slightly too small i in comparison with that of M. enue (336), p. 198. 
PLATE 34 (350: 1) 
Myxonema glomeratum (591), p. 205. 
