CHRYSOPHYCEAE 



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walls composed of two equal or unequal parts. The group possesses 

 the following morphological categories : 



(a) Unicellular motile types, e.g. Chromulina. 



(b) Encapsuled types, either free or epiphytic, e.g. Dinohryon spp. 

 {c) Colonial types, e.g. Syniira. 



Fig. 86. Chry'sophyceae. A, Phaeothamnion confervicolum. B, Hydrurus 

 foetidus. C, H. foetidus, apex showing branching. D, Phaeocystis pouchetii. 

 E, the same, portion of plant. / = leucosin. F, Ochromonas mutabilh. c = chloro- 

 plast, / = leucosin, 5 = stigma, t; = vacuole. G, Synura ulvella. H, Dinohryon 

 sertularia, colony. I, D. marchicuni. J, Epichrysis paludosa on Tribonema. 

 u = vacuole. (After Fritsch.) 



{d) Dendroid colonies, e.g. Dinohryon spp. 

 {e) Rhizopodial or amoeboid types, e.g. Rhizochrysis. 

 If) Palmelloid types, e.g. Phaeocystis and Hydnirtis, the latter 

 being a highly differentiated branched type. 



(g) Simple filamentous types, e.g. Phaeothamnion, 



