1920] Setchell-Gardner : Chlorophyceae 289 



Reinke, Zwei par. Algen, 1879, p. 476. Endoderma Lagerheim, 

 Bidr. Sver. Alg., 1883, p. 74. Entoderma Wille, Chlorophyceae, in 

 Engler and Prantl, Natiirl. Pflanzenfam., 1890, p. 94. 



It seems desirable to restore the earlier name of Entocladm, since 



it differs in one letter from the earlier Endocladiw J. Ag. (1841) and 



belongs to an entirely different class of algae. There seems, therefore, 



to be little likelihood of any serious confusion. The genus is now 



credited with several species, some of which occasionally possess hairs. 



It seems best to us to restrict the generic name to species without 



hairs. One characteristic of the genus is supposed to be the habitat, 



viz., growing within the cell membranes (or cuticula?) of various 



green, brown and red algae. It does not seem to us that this manner 



of growth ought to receive too great emphasis in determining the 



generic limits. Removal of this, as a criterion of generic distinction, 



would probabl}^ result in the combination of the genus Epidadia 



Reinke with the genus Entocladia Reinke. Since we have not as 



yet detected a species of Epicladia on the Pacific Coast, we may leave 



discussion of this point to others, but we may instance the genus 



Coleochaete as possessing a species endophytic in the membranes of 



the segments of Nitella while most of the rest of the species are 



epiphytic. 



Key to the Species 



1. Filaments scarcely if at all coalescing 1. E. viridis (p. 289) 



1. Filaments coalescing, at least at the center 2 



2. Free filaments numerous and long 2. E. codicola (p. 290) 



2. Free filaments few, short 3. E. cingens (p. 291) 



1. Entocladia viridis Reinke 



Filaments branching freely, S-Sjx diam., cells 1-6 diam. long, 

 cylindrical, or more often irregularly swollen and contorted ; chromato- 

 phore nearly covering the cell wall and containing a single pyrenoid. 



Growing on CalUthamnion Pikeanimi. Central California (Moss 

 Beach, San Mateo Co.). 



Reinke, Zwei par. Algen, 1879, p. 476, pi. 6, f. 6-9. Endoderma 

 viride Lagerheim, Bidr. till Sver. Alg., 1883, p. 74 ; Collins, Green Alg. 

 N. A., 1909, p. 279; Collins, Holden and Stiq\;hell, Phyc. Bor.-Amer. 

 (Exsice.),no. 2236. 



We have not been able to make a satisfactorily extensive study of 

 the Entocladia species apparently not uncommon in the cell and other 

 membranes of our various marine algae. Consequently we have 



