Laguna @Barine Laboratory 197 
CHLOROPHYCE 
ULVACEAE 
Ulva californica Wille 
Small tufts common on the rocks throughout the tidal zone. 
Ulva lactuca L. var. 
This ‘‘Sea Lettuce’’ is common on rocks and on other alge 
throughout the tidal zone. 
Enteromorpha flexuosa (Wulf.) J. Ag. 
Similarly distributed and about as common as the two Ulvas. 
eA 
Figure 107 
14; C, D, E, Codium mucronatum var. californicum. J, Ag. B, Codium adhaerans 
(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 em.; 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. 
