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Puget Sound Marine Sta. Pub. 



Vol. 1, No. 25 



cal cells, the outer layer of smaller colored cells. Unilocular sporangia 

 solitary, scattered, developed from the outer layer of cells ; pluriocular 

 sporangia and paraphyses wanting. 



KEY TO SPECIES 



A. Plants growing on Cystophyllum geminatum. 

 AA. Plants growing on rocks. 



1. C. calif ornica 

 2. C. bulligera 



1. CoiLODESME CALiFORNiCA (Rupr.) Kjcll. in Engl. & Prantl Natiirl. 



Pflanzenfam. 86 Lief. p. 204.) Fig. 27 



Plant body dark brown, hollow, inflated, thin membranaceous, cylindri- 

 cal, or sometimes ovoid, usually collapsed; the lower part of the sac 

 gradually tapering into a short stalk; the upper part of the sac usually 

 torn away in older plants. 



On Cystophyllum geminatum in the upper sublittoral zone. 



2. CoiLODESME BULLIGERA Strocmf. Isl. Algvcgct. p. 48, pi. 2. Fig. 26 



Plant body like the preceding but the inflated sac is more swollen and 

 bullate around the edges, somewhat smaller than the preceding, about one 

 dm. or less long. 



Colpomenia sinuosa 



Leathesia difformis 



PLATE 59 



Fig. 28. Diagrammatic sketch showing solid layers of cells making 

 up the irregular hollow mass of the plant body. X about 200. 



Fig. 29. Sketch showing dichotomously branching rows of cells 

 making up the irregular hollow mass of plant body ; s, sporangia. X 

 about 200. 



