1920] Setchell-Gardner : Chlorophyceae 291 



both genera, and under Endoderma {Entocladia) has included two 

 species, viz. E. Pithophorae "West and E. polymorphum West, which 

 are epiphytic, and thus, as he remarks {loc. cit., p. 280), "connects 

 Endoderma with Epicladia, but the filaments do not unite to form a 

 definite disk." 



Entocladia codicola seems to be confined to the coast of California 

 and to the above mentioned host plant, at least examination of con- 

 siderable material of different species of Codium in different localities, 

 ranging from Sitka, Alaska, to southern California, has not revealed 

 its presence elsewhere. 



3. Entocladia cingens S. and G. 

 Plate 18, fig. 7 



Thallus early forming a pseudo-parenchymatous tissue surround- 

 ing the filaments of the host within the membrane, having a few 

 marginal filaments extending parallel with the long diameter of the 

 host; cells in the center of the thallus nearly isodiametric, S-Sju, diam., 

 enlarging later to form sporangia; cells of the free marginal filaments 

 3-4ju, diam., 2-3 times as long as the diameter, terminal cells long, 

 conical. 



Growing within the membrane of Chaetomorpha calif ornica Wille. 

 Southern California (Ocean Beach, near San Diego). 



Setchell and Gardner, Phyc. Cont. I, 1920, p. 292, pi. 23, fig. 7. 



The plants of this species seem to be nearing maturity in December, 

 since a few empty cells in the center of the thallus were found from 

 which reproductive bodies probably had escaped. Aside from this 

 condition, nothing further is known of its method of reproduction. 



Entocladia cingcns is placed in this genus on account of the 

 resemblance of the vegetative development to that of the type species, 

 E. viridis Reinke, and because of the same endophytic habit as that 

 species. It differs from E. viridis in having the branching filaments 

 more closely coalescent, the enlarging cells in the main part of the 

 thallus soon forming a pseudo-parenchymatous tissue, leaving only 

 a few free marginal filaments. 



E. viridis, E. codicola, and E. cingens form a well connected series, 

 using the vegetative characters as a basis. The first named species 

 has a rather wide-spreading thallus, composed of relatively sparsely 

 branching filaments, scarcely, if at all, coalescing in the center. In 

 the second, the filaments coalesce freely in the center so that at least 



