llaguna 0artnc Laboratory 



197 



CHLOROPHYCE^ 



ULVACEAE 



Ulva californica \Yille 

 Small tufts common on the rocks throughout the tidal zone. 



Ulva lactuca L. var. 



This "Sea Lettuce" is common on rocks and on other algae 

 throughout the tidal zone. 



Enteromorpha flexuosa (Wulf. ) J. Ag. 

 Similarly distributed and about as common as the two Vivas. 



Figure 107 



A, C, D, E, Coclium mucronatum var. californicum. J, Ag. B, Coclium adliaerans 

 (Cabr.) Ag. 



CLADOPHORACEAE 



Chaetomorpha aerea (Dillw.) Kuetz 



(Figure 106) 



Frequent on the rocks of the high tidal zone, especially in high 

 tide-pools. Length of filament commonly 15 cm. ; cells .25 by .15 mm. 



Cladophora trichotoma (Ag.) Kuetz 



This and the preceding species are very commonly growing to- 

 gether, the long slender filaments of the Chaetomorpha sometimes 

 being attached to the more stocky Cladophora. 



