6 Bulletin Santa Barbara Society of Natural History. Vol. 1. 



Codium tomentosum, Stack. Common name "Mini." 

 Dark green, velvety stems in clusters, very flexible, 

 about the size of barley straw, 3 to 6 inches high. 



D. 



Order CONVERVACE^E. ULVACE^E. 



(The Ulvas, "Sea Lettuce," have flat or thread-like fronds 

 or leaves. Several species grow in fresh water.) 



Ulva compressa, Le Jolis. On rocks. 

 = &. enteromorpha of Farlow. 



Ulva enteromorpha, Le Jolis, In estuaries. 



Ulva fascinatus, Delile. 



Ulva intestinalis, Linn. In estuaries. 



Ulva latissima, Linn. "Broad-leaved Sea Lettuce." 



The genera Ulva and Enteromorpha have been some- 

 what mixed up and interchanged, and some of the 

 above named species may be found under both names. 



Chaetomorpha clavata, Farl. At low tide on sand-covered 

 rocks; filaments grass-green, coarse and rig-id; un- 

 branched, in tufts or masses. 



Cladophora cartilaginea, Rupr. On sandy rocks. 



Cladophora Isetevirens, Dilhv. Found on the Atlantic 

 Coast. (In this g-enus the filaments are branching - ). 



E. 



Order CHROOLEPIDE^E. 

 Chroolepus aureum, Linn. This is one of the few Algae 

 found growing out of water, its habitat being spray- 

 moistened cliffs, trees and other objects in the imme- 

 diate vicinity of, or overhang-ing the shore. 



F. 



Order DIATOMACE^E. 



The species of this Order have been omitted, as they 

 require the aid of the microscope for their study. 



